#596C81
Closest named color: Metallic Blue (#4F738E). oklch(52.4% 0.04 251.2), rgb(89, 108, 129).
Aa
White text reads best on this color (5.40:1).
About this color
#596C81 is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.040 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.026 away. White text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.88:1 |
| White text | 5.40:1 |
Values
| HEX | #596C81 |
| RGB | rgb(89, 108, 129) |
| HSL | hsl(212, 18%, 43%) |
| OKLCH | oklch(52.4% 0.04 251.2) |
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 #596C81 | 5.40:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #596C81 | 3.88:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #596C81 text on white | 5.40:1 | AA | Lc 76.9 | Fine for body text |
| #596C81 text on black | 3.88:1 | AA large text | Lc -24.8 | 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 600.
-
Step 50
50
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D4DAE0
oklch(88.6% 0.011 247.9)
-
Step 300
300
#B8C2CC
oklch(80.9% 0.018 248)
-
Step 400
400
#94A2B3
oklch(70.7% 0.03 253.3)
-
Step 500
500
#798BA0
oklch(63% 0.038 252.4)
-
Step 600
600 (this color)
#596C81
oklch(52.4% 0.04 251.2)
-
Step 700
700
#516376
oklch(49.2% 0.038 250)
-
Step 800
800
#435060
oklch(42.6% 0.031 253.8)
-
Step 900
900
#38434E
oklch(37.7% 0.024 248.5)
-
Step 950
950
#21272E
oklch(27% 0.016 252.4)
#596C81 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) | #646C82 | 0.016 |
| Deuteranopia (no green cones) | #606881 | 0.015 |
| Tritanopia (no blue cones) | #4D7173 | 0.035 |
| Achromatopsia (no color) | #6A6A6A | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #596C81
#596C81
oklch(52.4% 0.04 251.2)
- #796651
#796651
oklch(52.3% 0.04 69.6)
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 #596C81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.026
- Slate #516572 ΔE 0.031
- Dim Gray #696969 ΔE 0.040
- Battleship Gray #6C757D ΔE 0.041
- Dull Blue #49759C ΔE 0.045
- Stormy Blue #507B9C ΔE 0.051
- Denim #3B638C ΔE 0.053
- Grey Blue #647D8E ΔE 0.053
Use #596C81 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.