#31537D
Closest named color: Light Navy Blue (#2E5A88). oklch(43.7% 0.08 254.5), rgb(49, 83, 125).
Aa
White text reads best on this color (7.88:1).
About this color
#31537D is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.080 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.024 away. White text reads best on it, at 7.88:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.66:1 |
| White text | 7.88:1 |
Values
| HEX | #31537D |
| RGB | rgb(49, 83, 125) |
| HSL | hsl(213, 44%, 34%) |
| OKLCH | oklch(43.7% 0.08 254.5) |
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 #31537D | 7.88:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #31537D | 2.66:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #31537D text on white | 7.88:1 | AAA | Lc 87.2 | Fine for body text |
| #31537D text on black | 2.66:1 | Fails | Lc -14.9 | Not readable |
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 800.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ACC3DF
oklch(80.9% 0.047 253.5)
-
Step 400
400
#81A3CF
oklch(70.7% 0.075 255.1)
-
Step 500
500
#608CC3
oklch(63.1% 0.097 254.5)
-
Step 600
600
#4675AF
oklch(55.5% 0.105 254.5)
-
Step 700
700
#386297
oklch(49.1% 0.098 255.1)
-
Step 800
800 (this color)
#31537D
oklch(43.7% 0.08 254.5)
-
Step 900
900
#2A4362
oklch(37.8% 0.062 254.4)
-
Step 950
950
#19273A
oklch(27% 0.041 256.3)
#31537D 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) | #42557F | 0.023 |
| Deuteranopia (no green cones) | #384E7C | 0.016 |
| Tritanopia (no blue cones) | #005D62 | 0.070 |
| Achromatopsia (no color) | #515151 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31537D
#31537D
oklch(43.7% 0.08 254.5)
- #6B4A16
#6B4A16
oklch(43.6% 0.08 74.5)
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 #31537D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.024
- Dusk Blue #26538D ΔE 0.028
- Light Navy #155084 ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.030
- YInMn Blue #415A77 ΔE 0.034
- Dusk #4E5481 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.041
- Twilight #4E518B ΔE 0.046
Use #31537D 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.