#211B37
Closest named color: Oxford Blue (#1B263B). oklch(24.4% 0.052 291.9), rgb(33, 27, 55).
Aa
White text reads best on this color (16.44:1).
About this color
#211B37 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.052 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.036 away. White text reads best on it, at 16.44:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.052) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.27:1 |
| White text | 16.44:1 |
Values
| HEX | #211B37 |
| RGB | rgb(33, 27, 55) |
| HSL | hsl(253, 34%, 16%) |
| OKLCH | oklch(24.4% 0.052 291.9) |
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 #211B37 | 16.44:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #211B37 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #211B37 text on white | 16.44:1 | AAA | Lc 103.3 | Preferred for body text |
| #211B37 text on black | 1.27:1 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#D9D6EF
oklch(88.6% 0.034 291.2)
-
Step 300
300
#C1BAE6
oklch(80.9% 0.062 292.3)
-
Step 400
400
#A295DA
oklch(70.7% 0.1 292.3)
-
Step 500
500
#8C7ACF
oklch(63.2% 0.126 292.1)
-
Step 600
600
#7661BC
oklch(55.5% 0.138 291.9)
-
Step 700
700
#6350A2
oklch(49% 0.128 291.7)
-
Step 800
800
#514284
oklch(42.7% 0.107 291.7)
-
Step 900
900
#43386A
oklch(37.7% 0.084 292)
-
Step 950
950 (this color)
#211B37
oklch(24.4% 0.052 291.9)
#211B37 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) | #122038 | 0.028 |
| Deuteranopia (no green cones) | #131F36 | 0.026 |
| Tritanopia (no blue cones) | #1C2026 | 0.042 |
| Achromatopsia (no color) | #1F1F1F | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #211B37
#211B37
oklch(24.4% 0.052 291.9)
- #212201
#212201
oklch(24.3% 0.052 111.4)
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 #211B37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.036
- Dark #1B2431 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.044
- Jet #212529 ΔE 0.049
- Space Cadet #2B2D42 ΔE 0.063
- Eggplant #380835 ΔE 0.064
- Dark Purple #35063E ΔE 0.064
- Midnight Purple #280137 ΔE 0.066
Use #211B37 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.