#012137
Closest named color: Rich Black (#0D1B2A). oklch(23.8% 0.056 243.1), rgb(1, 33, 55).
Aa
White text reads best on this color (16.48:1).
About this color
#012137 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.056 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.030 away. White text reads best on it, at 16.48:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.48:1 |
Values
| HEX | #012137 |
| RGB | rgb(1, 33, 55) |
| HSL | hsl(204, 96%, 11%) |
| OKLCH | oklch(23.8% 0.056 243.1) |
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 #012137 | 16.48:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #012137 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #012137 text on white | 16.48:1 | AAA | Lc 103.2 | Preferred for body text |
| #012137 text on black | 1.27:1 | 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
#C5DDF0
oklch(88.6% 0.037 241.8)
-
Step 300
300
#9CC6E9
oklch(80.9% 0.067 243.9)
-
Step 400
400
#62A8DE
oklch(70.7% 0.106 243.4)
-
Step 500
500
#2B91D5
oklch(63.2% 0.136 243.2)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#04466C
oklch(37.8% 0.088 242.2)
-
Step 950
950 (this color)
#012137
oklch(23.8% 0.056 243.1)
#012137 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) | #162238 | 0.025 |
| Deuteranopia (no green cones) | #0E1D37 | 0.018 |
| Tritanopia (no blue cones) | #002629 | 0.037 |
| Achromatopsia (no color) | #1F1F1F | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #012137
#012137
oklch(23.8% 0.056 243.1)
- #301800
#301800
oklch(23.8% 0.054 63.5)
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 #012137, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.030
- Dark #1B2431 ΔE 0.036
- Oxford Blue #1B263B ΔE 0.038
- Jet #212529 ΔE 0.053
- Navy Blue #001146 ΔE 0.060
- Rich Navy #001219 ΔE 0.075
- Space Cadet #2B2D42 ΔE 0.075
- Gunmetal #293241 ΔE 0.083
Use #012137 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.