#597BB8
Closest named color: Steel Blue (#4682B4). oklch(58.4% 0.102 261.5), rgb(89, 123, 184).
Aa
Black text reads best on this color (4.95:1).
About this color
#597BB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.102 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.028 away. Black text reads best on it, at 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.95:1 |
| White text | 4.24:1 |
Values
| HEX | #597BB8 |
| RGB | rgb(89, 123, 184) |
| HSL | hsl(219, 40%, 54%) |
| OKLCH | oklch(58.4% 0.102 261.5) |
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 #597BB8 | 4.24:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #597BB8 | 4.95:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #597BB8 text on white | 4.24:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #597BB8 text on black | 4.95:1 | AA | Lc -32.5 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEB
oklch(88.6% 0.026 261.1)
-
Step 300
300
#B0C1DF
oklch(80.8% 0.046 261.8)
-
Step 400
400
#87A1CF
oklch(70.6% 0.074 261.7)
-
Step 500
500
#698AC3
oklch(63.2% 0.094 261)
-
Step 600
600 (this color)
#597BB8
oklch(58.4% 0.102 261.5)
-
Step 700
700
#426096
oklch(49.1% 0.094 261.5)
-
Step 800
800
#364E7A
oklch(42.6% 0.079 261.8)
-
Step 900
900
#2F4162
oklch(37.6% 0.062 262)
-
Step 950
950
#1C2639
oklch(26.9% 0.038 262.7)
#597BB8 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) | #6380BB | 0.020 |
| Deuteranopia (no green cones) | #5877B7 | 0.011 |
| Tritanopia (no blue cones) | #2B8891 | 0.091 |
| Achromatopsia (no color) | #7B7B7B | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #597BB8
#597BB8
oklch(58.4% 0.102 261.5)
- #9A7529
#9A7529
oklch(58.5% 0.103 81.9)
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 #597BB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.028
- Cool Blue #4984B8 ΔE 0.028
- Off Blue #5684AE ΔE 0.033
- Windows Blue #3778BF ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.040
- Stormy Blue #507B9C ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.047
- Dull Blue #49759C ΔE 0.050
Use #597BB8 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.