#102431
Closest named color: Dark (#1B2431). oklch(25% 0.036 238.9), rgb(16, 36, 49).
Aa
White text reads best on this color (15.92:1).
About this color
#102431 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.036 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.015 away. White text reads best on it, at 15.92:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.31:1 |
| White text | 15.92:1 |
Values
| HEX | #102431 |
| RGB | rgb(16, 36, 49) |
| HSL | hsl(204, 51%, 13%) |
| OKLCH | oklch(25% 0.036 238.9) |
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 #102431 | 15.92:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #102431 | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #102431 text on white | 15.92:1 | AAA | Lc 102.8 | Preferred for body text |
| #102431 text on black | 1.31:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE7
oklch(88.6% 0.023 237.7)
-
Step 300
300
#A8C5DA
oklch(80.9% 0.043 239.6)
-
Step 400
400
#79A7C7
oklch(70.7% 0.068 239.3)
-
Step 500
500
#5491B8
oklch(63.1% 0.087 238.3)
-
Step 600
600
#377AA4
oklch(55.5% 0.094 239.2)
-
Step 700
700
#28678D
oklch(49.1% 0.088 238.8)
-
Step 800
800
#235472
oklch(42.6% 0.072 238.6)
-
Step 900
900
#22465C
oklch(37.8% 0.056 237.6)
-
Step 950
950 (this color)
#102431
oklch(25% 0.036 238.9)
#102431 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) | #1E2432 | 0.020 |
| Deuteranopia (no green cones) | #1A2031 | 0.019 |
| Tritanopia (no blue cones) | #002728 | 0.028 |
| Achromatopsia (no color) | #222222 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #102431
#102431
oklch(25% 0.036 238.9)
- #2E1D0F
#2E1D0F
oklch(24.9% 0.036 59.6)
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 #102431, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.015
- Oxford Blue #1B263B ΔE 0.026
- Jet #212529 ΔE 0.029
- Rich Black #0D1B2A ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.061
- Gunmetal #293241 ΔE 0.067
- Navy Blue #001146 ΔE 0.081
- Rich Navy #001219 ΔE 0.082
Use #102431 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.