#597FCF
Closest named color: Cool Blue (#4984B8). oklch(60.5% 0.13 263.8), rgb(89, 127, 207).
Aa
Black text reads best on this color (5.36:1).
About this color
#597FCF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.130 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.045 away. Black text reads best on it, at 5.36:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.36:1 |
| White text | 3.91:1 |
Values
| HEX | #597FCF |
| RGB | rgb(89, 127, 207) |
| HSL | hsl(221, 55%, 58%) |
| OKLCH | oklch(60.5% 0.13 263.8) |
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 #597FCF | 3.91:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #597FCF | 5.36:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #597FCF text on white | 3.91:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #597FCF text on black | 5.36:1 | AA | Lc -35.3 | 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 500.
-
Step 50
50
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ACC1EA
oklch(80.9% 0.063 263.7)
-
Step 400
400
#80A0E0
oklch(70.7% 0.101 263.6)
-
Step 500
500 (this color)
#597FCF
oklch(60.5% 0.13 263.8)
-
Step 600
600
#476FC5
oklch(55.6% 0.141 263.7)
-
Step 700
700
#395CAA
oklch(49% 0.131 264)
-
Step 800
800
#2F4C8A
oklch(42.7% 0.109 263.6)
-
Step 900
900
#2A406E
oklch(37.8% 0.084 263.6)
-
Step 950
950
#192641
oklch(27.2% 0.054 263.7)
#597FCF 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) | #5E86D2 | 0.020 |
| Deuteranopia (no green cones) | #4E7CCD | 0.016 |
| Tritanopia (no blue cones) | #00919D | 0.116 |
| Achromatopsia (no color) | #818181 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #597FCF
#597FCF
oklch(60.5% 0.13 263.8)
- #A57A00
#A57A00
oklch(60.6% 0.124 83.8)
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 #597FCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.047
- Soft Blue #6488EA ΔE 0.047
- Windows Blue #3778BF ΔE 0.047
- Steel Blue #4682B4 ΔE 0.050
- Water Blue #0E87CC ΔE 0.051
- Faded Blue #658CBB ΔE 0.055
- Off Blue #5684AE ΔE 0.057
Use #597FCF 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.