#597E99
Closest named color: Stormy Blue (#507B9C). oklch(57.6% 0.059 240.7), rgb(89, 126, 153).
Aa
Black text reads best on this color (4.86:1).
About this color
#597E99 is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.059 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.016 away. Black text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #597E99 |
| RGB | rgb(89, 126, 153) |
| HSL | hsl(205, 26%, 47%) |
| OKLCH | oklch(57.6% 0.059 240.7) |
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 #597E99 | 4.31:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #597E99 | 4.86:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #597E99 text on white | 4.31:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #597E99 text on black | 4.86:1 | AA | Lc -31.9 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B2C3D0
oklch(80.8% 0.026 240.7)
-
Step 400
400
#89A5B9
oklch(70.8% 0.043 239.3)
-
Step 500
500
#6C8EA8
oklch(63.1% 0.055 241.6)
-
Step 600
600 (this color)
#597E99
oklch(57.6% 0.059 240.7)
-
Step 700
700
#44657D
oklch(49.1% 0.054 240.8)
-
Step 800
800
#385266
oklch(42.6% 0.046 242.2)
-
Step 900
900
#304453
oklch(37.6% 0.036 241.3)
-
Step 950
950
#1D2830
oklch(27% 0.021 240.1)
#597E99 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) | #727E9A | 0.032 |
| Deuteranopia (no green cones) | #6A7799 | 0.028 |
| Tritanopia (no blue cones) | #418587 | 0.048 |
| Achromatopsia (no color) | #7A7A7A | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #597E99
#597E99
oklch(57.6% 0.059 240.7)
- #937155
#937155
oklch(57.5% 0.059 60.7)
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 #597E99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.016
- Grey Blue #647D8E ΔE 0.020
- Cerulean #457B9D ΔE 0.025
- Off Blue #5684AE ΔE 0.032
- Slate Gray #708090 ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.034
- Battleship Grey #6B7C85 ΔE 0.035
- Dull Blue #49759C ΔE 0.035
Use #597E99 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.