#102437
Closest named color: Dark (#1B2431). oklch(25.4% 0.045 248.9), rgb(16, 36, 55).
Aa
White text reads best on this color (15.79:1).
About this color
#102437 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.045 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.018 away. White text reads best on it, at 15.79:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.32:1 |
| White text | 15.79:1 |
Values
| HEX | #102437 |
| RGB | rgb(16, 36, 55) |
| HSL | hsl(209, 55%, 14%) |
| OKLCH | oklch(25.4% 0.045 248.9) |
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 #102437 | 15.79:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #102437 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #102437 text on white | 15.79:1 | AAA | Lc 102.6 | Preferred for body text |
| #102437 text on black | 1.32:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A7C4E2
oklch(80.9% 0.053 249.4)
-
Step 400
400
#77A5D3
oklch(70.7% 0.084 249.1)
-
Step 500
500
#528EC8
oklch(63.1% 0.108 249.1)
-
Step 600
600
#3477B5
oklch(55.6% 0.118 249.3)
-
Step 700
700
#26649B
oklch(49.1% 0.109 248.8)
-
Step 800
800
#21527E
oklch(42.7% 0.09 248.7)
-
Step 900
900
#214465
oklch(37.7% 0.07 248.9)
-
Step 950
950 (this color)
#102437
oklch(25.4% 0.045 248.9)
#102437 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) | #1C2538 | 0.017 |
| Deuteranopia (no green cones) | #172137 | 0.013 |
| Tritanopia (no blue cones) | #00282B | 0.035 |
| Achromatopsia (no color) | #232323 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #102437
#102437
oklch(25.4% 0.045 248.9)
- #301E08
#301E08
oklch(25.3% 0.044 68.8)
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 #102437, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.018
- Oxford Blue #1B263B ΔE 0.019
- Jet #212529 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.056
- Gunmetal #293241 ΔE 0.064
- Navy Blue #001146 ΔE 0.074
- Marine #042E60 ΔE 0.077
Use #102437 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.