#596A81
Closest named color: Slate (#516572). oklch(51.9% 0.042 256), rgb(89, 106, 129).
Aa
White text reads best on this color (5.52:1).
About this color
#596A81 is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.042 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.029 away. White text reads best on it, at 5.52:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.80:1 |
| White text | 5.52:1 |
Values
| HEX | #596A81 |
| RGB | rgb(89, 106, 129) |
| HSL | hsl(215, 18%, 43%) |
| OKLCH | oklch(51.9% 0.042 256) |
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 #596A81 | 5.52:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #596A81 | 3.80:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #596A81 text on white | 5.52:1 | AA | Lc 77.6 | Fine for body text |
| #596A81 text on black | 3.80:1 | AA large text | Lc -24.2 | Dividers and decoration only |
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 700.
-
Step 50
50
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4DAE1
oklch(88.6% 0.012 252.1)
-
Step 300
300
#B8C1CE
oklch(80.8% 0.021 257.5)
-
Step 400
400
#94A2B5
oklch(70.7% 0.032 256)
-
Step 500
500
#798BA3
oklch(63.1% 0.042 255.7)
-
Step 600
600
#62758E
oklch(55.6% 0.045 255.4)
-
Step 700
700 (this color)
#596A81
oklch(51.9% 0.042 256)
-
Step 800
800
#435062
oklch(42.7% 0.034 256.6)
-
Step 900
900
#384250
oklch(37.6% 0.027 256.8)
-
Step 950
950
#21272F
oklch(27% 0.017 255.7)
#596A81 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) | #626B82 | 0.013 |
| Deuteranopia (no green cones) | #5E6781 | 0.011 |
| Tritanopia (no blue cones) | #4D6F72 | 0.036 |
| Achromatopsia (no color) | #696969 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #596A81
#596A81
oklch(51.9% 0.042 256)
- #77664E
#77664E
oklch(52% 0.042 76.1)
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 #596A81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.029
- Metallic Blue #4F738E ΔE 0.029
- Dim Gray #696969 ΔE 0.042
- Battleship Gray #6C757D ΔE 0.046
- Dull Blue #49759C ΔE 0.047
- Denim #3B638C ΔE 0.049
- Muted Blue #3B719F ΔE 0.054
- Stormy Blue #507B9C ΔE 0.055
Use #596A81 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.