#011B35
Closest named color: Rich Black (#0D1B2A). oklch(21.9% 0.061 250.5), rgb(1, 27, 53).
Aa
White text reads best on this color (17.36:1).
About this color
#011B35 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.061 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.025 away. White text reads best on it, at 17.36:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.36:1 |
Values
| HEX | #011B35 |
| RGB | rgb(1, 27, 53) |
| HSL | hsl(210, 96%, 11%) |
| OKLCH | oklch(21.9% 0.061 250.5) |
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 #011B35 | 17.36:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #011B35 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #011B35 text on white | 17.36:1 | AAA | Lc 104.0 | Preferred for body text |
| #011B35 text on black | 1.20:1 | 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
#C6DCF3
oklch(88.5% 0.04 249.5)
-
Step 300
300
#9EC5EE
oklch(81% 0.072 250)
-
Step 400
400
#67A5E6
oklch(70.7% 0.115 250.8)
-
Step 500
500
#388DDE
oklch(63.1% 0.147 250.5)
-
Step 600
600
#0175CC
oklch(55.6% 0.16 250.7)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#104372
oklch(37.7% 0.096 250.8)
-
Step 950
950 (this color)
#011B35
oklch(21.9% 0.061 250.5)
#011B35 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) | #0E1D36 | 0.018 |
| Deuteranopia (no green cones) | #051834 | 0.010 |
| Tritanopia (no blue cones) | #002125 | 0.043 |
| Achromatopsia (no color) | #1A1A1A | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #011B35
#011B35
oklch(21.9% 0.061 250.5)
- #281600
#281600
oklch(22% 0.047 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 #011B35, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.025
- Navy Blue #001146 ΔE 0.046
- Dark #1B2431 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.054
- Rich Navy #001219 ΔE 0.062
- Jet #212529 ΔE 0.067
- Night Blue #040348 ΔE 0.070
- Dark Navy #000435 ΔE 0.071
Use #011B35 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.