#012237
Closest named color: Rich Black (#0D1B2A). oklch(24.1% 0.055 241.3), rgb(1, 34, 55).
Aa
White text reads best on this color (16.33:1).
About this color
#012237 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.055 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.031 away. White text reads best on it, at 16.33:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.28:1 |
| White text | 16.33:1 |
Values
| HEX | #012237 |
| RGB | rgb(1, 34, 55) |
| HSL | hsl(203, 96%, 11%) |
| OKLCH | oklch(24.1% 0.055 241.3) |
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 #012237 | 16.33:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #012237 | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #012237 text on white | 16.33:1 | AAA | Lc 103.0 | Preferred for body text |
| #012237 text on black | 1.28:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DDEF
oklch(88.5% 0.036 240.3)
-
Step 300
300
#9BC7E7
oklch(80.9% 0.065 240.2)
-
Step 400
400
#61A9DC
oklch(70.8% 0.104 241.2)
-
Step 500
500
#2892D2
oklch(63.2% 0.133 241.1)
-
Step 600
600
#007BB8
oklch(55.7% 0.13 241.1)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#02466B
oklch(37.7% 0.087 241.2)
-
Step 950
950 (this color)
#012237
oklch(24.1% 0.055 241.3)
#012237 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) | #182338 | 0.027 |
| Deuteranopia (no green cones) | #101E37 | 0.019 |
| Tritanopia (no blue cones) | #00272A | 0.035 |
| Achromatopsia (no color) | #202020 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #012237
#012237
oklch(24.1% 0.055 241.3)
- #321800
#321800
oklch(24.1% 0.056 61)
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 #012237, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.031
- Dark #1B2431 ΔE 0.034
- Oxford Blue #1B263B ΔE 0.036
- Jet #212529 ΔE 0.050
- Navy Blue #001146 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.073
- Rich Navy #001219 ΔE 0.077
- Gunmetal #293241 ΔE 0.080
Use #012237 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.