#012437
Closest named color: Dark (#1B2431). oklch(24.7% 0.053 237.5), rgb(1, 36, 55).
Aa
White text reads best on this color (16.04:1).
About this color
#012437 is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.053 and its hue 238°. 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 16.04:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.30:1 |
| White text | 16.04:1 |
Values
| HEX | #012437 |
| RGB | rgb(1, 36, 55) |
| HSL | hsl(201, 96%, 11%) |
| OKLCH | oklch(24.7% 0.053 237.5) |
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 #012437 | 16.04:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #012437 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #012437 text on white | 16.04:1 | AAA | Lc 102.7 | Preferred for body text |
| #012437 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C5DDEE
oklch(88.5% 0.035 238.7)
-
Step 300
300
#9BC7E5
oklch(80.9% 0.063 238.4)
-
Step 400
400
#5FAAD8
oklch(70.8% 0.101 237.4)
-
Step 500
500
#2293CD
oklch(63% 0.129 237.5)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950 (this color)
#012437
oklch(24.7% 0.053 237.5)
#012437 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 | 0.030 |
| Deuteranopia (no green cones) | #131F37 | 0.024 |
| Tritanopia (no blue cones) | #00292B | 0.034 |
| Achromatopsia (no color) | #212121 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #012437
#012437
oklch(24.7% 0.053 237.5)
- #331904
#331904
oklch(24.6% 0.053 56.8)
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 #012437, 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 0.032
- Rich Black #0D1B2A ΔE 0.036
- Jet #212529 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.068
- Navy Blue #001146 ΔE 0.069
- Gunmetal #293241 ΔE 0.074
- Marine #042E60 ΔE 0.079
Use #012437 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.