#597BBF
Closest named color: Cool Blue (#4984B8). oklch(58.8% 0.112 263.2), rgb(89, 123, 191).
Aa
Black text reads best on this color (5.01:1).
About this color
#597BBF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.112 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.033 away. Black text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.01:1 |
| White text | 4.19:1 |
Values
| HEX | #597BBF |
| RGB | rgb(89, 123, 191) |
| HSL | hsl(220, 44%, 55%) |
| OKLCH | oklch(58.8% 0.112 263.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #597BBF | 4.19:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #597BBF | 5.01:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #597BBF text on white | 4.19:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #597BBF text on black | 5.01:1 | AA | Lc -32.9 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0DAEC
oklch(88.6% 0.027 262.3)
-
Step 300
300
#B0C1E2
oklch(80.9% 0.05 263.7)
-
Step 400
400
#86A1D4
oklch(70.8% 0.081 262.8)
-
Step 500
500
#6889C8
oklch(63.2% 0.103 262.7)
-
Step 600
600 (this color)
#597BBF
oklch(58.8% 0.112 263.2)
-
Step 700
700
#415F9C
oklch(49.2% 0.104 263.3)
-
Step 800
800
#364E7E
oklch(42.8% 0.085 263.1)
-
Step 900
900
#2F4165
oklch(37.8% 0.066 263.3)
-
Step 950
950
#1B263B
oklch(26.9% 0.042 262.7)
#597BBF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #6081C2 | 0.020 |
| Deuteranopia (no green cones) | #5477BE | 0.013 |
| Tritanopia (no blue cones) | #238A94 | 0.101 |
| Achromatopsia (no color) | #7C7C7C | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #597BBF
#597BBF
oklch(58.8% 0.112 263.2)
- #9C761B
#9C761B
oklch(58.8% 0.112 83.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #597BBF, closest first.
No curated palette has a color within ΔE 0.04 of #597BBF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.033
- Steel Blue #4682B4 ΔE 0.034
- Windows Blue #3778BF ΔE 0.036
- Off Blue #5684AE ΔE 0.041
- Dusty Blue #5A86AD ΔE 0.047
- Flat Blue #3C73A8 ΔE 0.053
- Faded Blue #658CBB ΔE 0.054
- Water Blue #0E87CC ΔE 0.054
Use #597BBF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.