#002437
Closest named color: Dark (#1B2431). oklch(24.7% 0.054 236.9), rgb(0, 36, 55).
Aa
White text reads best on this color (16.06:1).
About this color
#002437 is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.054 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.031 away. White text reads best on it, at 16.06:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.30:1 |
| White text | 16.06:1 |
Values
| HEX | #002437 |
| RGB | rgb(0, 36, 55) |
| HSL | hsl(201, 100%, 11%) |
| OKLCH | oklch(24.7% 0.054 236.9) |
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 #002437 | 16.06:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #002437 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #002437 text on white | 16.06:1 | AAA | Lc 102.7 | Preferred for body text |
| #002437 text on black | 1.30:1 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C4DDEE
oklch(88.4% 0.036 237.6)
-
Step 300
300
#9AC8E5
oklch(81% 0.063 236.3)
-
Step 400
400
#5DAAD8
oklch(70.7% 0.102 236.8)
-
Step 500
500
#1C94CE
oklch(63.2% 0.13 236.8)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950 (this color)
#002437
oklch(24.7% 0.054 236.9)
#002437 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) | #1B2438 | 0.031 |
| Deuteranopia (no green cones) | #131F37 | 0.024 |
| Tritanopia (no blue cones) | #00292B | 0.034 |
| Achromatopsia (no color) | #212121 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #002437
#002437
oklch(24.7% 0.054 236.9)
- #341904
#341904
oklch(24.7% 0.054 55.7)
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 #002437, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.031
- Oxford Blue #1B263B ΔE 0.033
- Rich Black #0D1B2A ΔE 0.036
- Jet #212529 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.069
- Navy Blue #001146 ΔE 0.069
- Gunmetal #293241 ΔE 0.075
- Marine #042E60 ΔE 0.079
Use #002437 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.