#001631
Closest named color: Rich Black (#0D1B2A). oklch(20% 0.062 253), rgb(0, 22, 49).
Aa
White text reads best on this color (18.11:1).
About this color
#001631 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.062 and its hue 253°. 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 18.11:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.11:1 |
Values
| HEX | #001631 |
| RGB | rgb(0, 22, 49) |
| HSL | hsl(213, 100%, 10%) |
| OKLCH | oklch(20% 0.062 253) |
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 #001631 | 18.11:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #001631 | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #001631 text on white | 18.11:1 | AAA | Lc 104.6 | Preferred for body text |
| #001631 text on black | 1.15:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#9FC4EF
oklch(80.9% 0.073 252.5)
-
Step 400
400
#6AA4E8
oklch(70.7% 0.117 253.3)
-
Step 500
500
#3E8CE1
oklch(63.2% 0.149 252.9)
-
Step 600
600
#1474CF
oklch(55.7% 0.163 252.9)
-
Step 700
700
#0060B3
oklch(49% 0.152 253.2)
-
Step 800
800
#0A4F91
oklch(42.7% 0.126 253.2)
-
Step 900
900
#144274
oklch(37.7% 0.099 253.5)
-
Step 950
950 (this color)
#001631
oklch(20% 0.062 253)
#001631 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) | #071832 | 0.013 |
| Deuteranopia (no green cones) | #001430 | 0.007 |
| Tritanopia (no blue cones) | #001D21 | 0.046 |
| Achromatopsia (no color) | #161616 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001631
#001631
oklch(20% 0.062 253)
- #221200
#221200
oklch(20% 0.043 70.9)
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 #001631, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.031
- Navy Blue #001146 ΔE 0.044
- Rich Navy #001219 ΔE 0.050
- Dark Navy #000435 ΔE 0.055
- Night Blue #040348 ΔE 0.063
- Dark Navy Blue #00022E ΔE 0.066
- Very Dark Blue #000133 ΔE 0.066
- Dark #1B2431 ΔE 0.067
Use #001631 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.