#012637
Closest named color: Dark (#1B2431). oklch(25.3% 0.051 233.4), rgb(1, 38, 55).
Aa
White text reads best on this color (15.74:1).
About this color
#012637 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.051 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.029 away. White text reads best on it, at 15.74:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.33:1 |
| White text | 15.74:1 |
Values
| HEX | #012637 |
| RGB | rgb(1, 38, 55) |
| HSL | hsl(199, 96%, 11%) |
| OKLCH | oklch(25.3% 0.051 233.4) |
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 #012637 | 15.74:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #012637 | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #012637 text on white | 15.74:1 | AAA | Lc 102.4 | Preferred for body text |
| #012637 text on black | 1.33:1 | 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
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C4DEEC
oklch(88.6% 0.034 231.2)
-
Step 300
300
#9AC8E2
oklch(80.9% 0.061 233.3)
-
Step 400
400
#5DABD4
oklch(70.7% 0.098 233.4)
-
Step 500
500
#1B95C8
oklch(63.1% 0.124 233.1)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950 (this color)
#012637
oklch(25.3% 0.051 233.4)
#012637 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) | #1D2638 | 0.032 |
| Deuteranopia (no green cones) | #162137 | 0.026 |
| Tritanopia (no blue cones) | #002B2C | 0.032 |
| Achromatopsia (no color) | #232323 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #012637
#012637
oklch(25.3% 0.051 233.4)
- #351B08
#351B08
oklch(25.4% 0.051 54.2)
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 #012637, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.029
- Oxford Blue #1B263B ΔE 0.030
- Rich Black #0D1B2A ΔE 0.041
- Jet #212529 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.064
- Gunmetal #293241 ΔE 0.068
- Navy Blue #001146 ΔE 0.076
- Midnight Green #073B4C ΔE 0.077
Use #012637 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.