#011F2D
Closest named color: Rich Black (#0D1B2A). oklch(22.5% 0.045 232.4), rgb(1, 31, 45).
Aa
White text reads best on this color (17.00:1).
About this color
#011F2D is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.045 and its hue 232°. 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 17.00:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.00:1 |
Values
| HEX | #011F2D |
| RGB | rgb(1, 31, 45) |
| HSL | hsl(199, 96%, 9%) |
| OKLCH | oklch(22.5% 0.045 232.4) |
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 #011F2D | 17.00:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #011F2D | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #011F2D text on white | 17.00:1 | AAA | Lc 103.7 | Preferred for body text |
| #011F2D 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300
#9FC7DD
oklch(80.8% 0.053 232.3)
-
Step 400
400
#67AACD
oklch(70.7% 0.085 232.5)
-
Step 500
500
#3694C0
oklch(63.1% 0.109 232.7)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#0D4861
oklch(37.8% 0.071 232.1)
-
Step 950
950 (this color)
#011F2D
oklch(22.5% 0.045 232.4)
#011F2D 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) | #181F2E | 0.029 |
| Deuteranopia (no green cones) | #121A2D | 0.025 |
| Tritanopia (no blue cones) | #002324 | 0.027 |
| Achromatopsia (no color) | #1C1C1C | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #011F2D
#011F2D
oklch(22.5% 0.045 232.4)
- #2C1506
#2C1506
oklch(22.5% 0.045 52.4)
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 #011F2D, 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 0.040
- Oxford Blue #1B263B ΔE 0.050
- Jet #212529 ΔE 0.051
- Rich Navy #001219 ΔE 0.058
- Navy Blue #001146 ΔE 0.069
- Almost Black #070D0D ΔE 0.082
- Space Cadet #2B2D42 ΔE 0.087
Use #011F2D 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.