#091231
Closest named color: Rich Black (#0D1B2A). oklch(19.6% 0.063 267.9), rgb(9, 18, 49).
Aa
White text reads best on this color (18.38:1).
About this color
#091231 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.063 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.038 away. White text reads best on it, at 18.38:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.38:1 |
Values
| HEX | #091231 |
| RGB | rgb(9, 18, 49) |
| HSL | hsl(227, 69%, 11%) |
| OKLCH | oklch(19.6% 0.063 267.9) |
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 #091231 | 18.38:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #091231 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #091231 text on white | 18.38:1 | AAA | Lc 104.9 | Preferred for body text |
| #091231 text on black | 1.14:1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ACC0F2
oklch(81% 0.074 267.7)
-
Step 400
400
#809DEB
oklch(70.6% 0.119 267.8)
-
Step 500
500
#6283E5
oklch(63.2% 0.152 267.9)
-
Step 600
600
#4A6AD3
oklch(55.6% 0.166 267.9)
-
Step 700
700
#3B58B7
oklch(49.2% 0.154 267.6)
-
Step 800
800
#314894
oklch(42.7% 0.128 268)
-
Step 900
900
#2B3D76
oklch(37.7% 0.1 268.2)
-
Step 950
950 (this color)
#091231
oklch(19.6% 0.063 267.9)
#091231 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) | #021632 | 0.015 |
| Deuteranopia (no green cones) | #001330 | 0.014 |
| Tritanopia (no blue cones) | #00191F | 0.050 |
| Achromatopsia (no color) | #141414 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #091231
#091231
oklch(19.6% 0.063 267.9)
- #1D1400
#1D1400
oklch(19.7% 0.04 87.9)
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 #091231, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.038
- Navy Blue #001146 ΔE 0.043
- Dark Navy #000435 ΔE 0.049
- Rich Navy #001219 ΔE 0.054
- Night Blue #040348 ΔE 0.057
- Midnight #03012D ΔE 0.059
- Dark Navy Blue #00022E ΔE 0.059
- Very Dark Blue #000133 ΔE 0.060
Use #091231 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.