#011B27
Closest named color: Rich Black (#0D1B2A). oklch(20.9% 0.04 230.9), rgb(1, 27, 39).
Aa
White text reads best on this color (17.68:1).
About this color
#011B27 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.040 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.017 away. White text reads best on it, at 17.68:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.68:1 |
Values
| HEX | #011B27 |
| RGB | rgb(1, 27, 39) |
| HSL | hsl(199, 95%, 8%) |
| OKLCH | oklch(20.9% 0.04 230.9) |
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 #011B27 | 17.68:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #011B27 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #011B27 text on white | 17.68:1 | AAA | Lc 104.3 | Preferred for body text |
| #011B27 text on black | 1.18:1 | 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
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE8
oklch(88.5% 0.027 230.4)
-
Step 300
300
#A2C7DA
oklch(80.9% 0.048 230.4)
-
Step 400
400
#6DAAC8
oklch(70.8% 0.077 230.6)
-
Step 500
500
#4194BA
oklch(63.1% 0.098 231)
-
Step 600
600
#157EA6
oklch(55.7% 0.106 230.6)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#0B5673
oklch(42.6% 0.082 231)
-
Step 900
900
#15475D
oklch(37.6% 0.064 231.2)
-
Step 950
950 (this color)
#011B27
oklch(20.9% 0.04 230.9)
#011B27 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) | #151B28 | 0.027 |
| Deuteranopia (no green cones) | #0F1727 | 0.022 |
| Tritanopia (no blue cones) | #001E1F | 0.023 |
| Achromatopsia (no color) | #181818 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #011B27
#011B27
oklch(20.9% 0.04 230.9)
- #261206
#261206
oklch(20.8% 0.04 51.2)
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 #011B27, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.017
- Rich Navy #001219 ΔE 0.041
- Dark #1B2431 ΔE 0.053
- Jet #212529 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.065
- Almost Black #070D0D ΔE 0.065
- Navy Blue #001146 ΔE 0.071
- Dark Navy #000435 ΔE 0.082
Use #011B27 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.