#011F2F
Closest named color: Rich Black (#0D1B2A). oklch(22.6% 0.047 235.9), rgb(1, 31, 47).
Aa
White text reads best on this color (16.95:1).
About this color
#011F2F is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.047 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.018 away. White text reads best on it, at 16.95:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.95:1 |
Values
| HEX | #011F2F |
| RGB | rgb(1, 31, 47) |
| HSL | hsl(201, 96%, 9%) |
| OKLCH | oklch(22.6% 0.047 235.9) |
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 #011F2F | 16.95:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #011F2F | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #011F2F text on white | 16.95:1 | AAA | Lc 103.7 | Preferred for body text |
| #011F2F text on black | 1.23:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEB
oklch(88.6% 0.03 235.7)
-
Step 300
300
#9FC7E0
oklch(80.9% 0.055 235.8)
-
Step 400
400
#67A9D1
oklch(70.6% 0.089 236.5)
-
Step 500
500
#3593C5
oklch(63% 0.114 236.2)
-
Step 600
600
#007DAF
oklch(55.7% 0.119 235.4)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#0C4764
oklch(37.7% 0.075 236.2)
-
Step 950
950 (this color)
#011F2F
oklch(22.6% 0.047 235.9)
#011F2F 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) | #171F30 | 0.027 |
| Deuteranopia (no green cones) | #111B2F | 0.022 |
| Tritanopia (no blue cones) | #002325 | 0.028 |
| Achromatopsia (no color) | #1C1C1C | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #011F2F
#011F2F
oklch(22.6% 0.047 235.9)
- #2C1504
#2C1504
oklch(22.5% 0.047 55.7)
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 #011F2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.018
- Dark #1B2431 ΔE 0.039
- Oxford Blue #1B263B ΔE 0.048
- Jet #212529 ΔE 0.052
- Rich Navy #001219 ΔE 0.060
- Navy Blue #001146 ΔE 0.066
- Almost Black #070D0D ΔE 0.084
- Space Cadet #2B2D42 ΔE 0.085
Use #011F2F 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.