#221738
Closest named color: Oxford Blue (#1B263B). oklch(23.7% 0.062 296.8), rgb(34, 23, 56).
Aa
White text reads best on this color (16.83:1).
About this color
#221738 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.062 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.048 away. White text reads best on it, at 16.83:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.062) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.24:1 |
| White text | 16.83:1 |
Values
| HEX | #221738 |
| RGB | rgb(34, 23, 56) |
| HSL | hsl(260, 42%, 15%) |
| OKLCH | oklch(23.7% 0.062 296.8) |
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 #221738 | 16.83:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #221738 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #221738 text on white | 16.83:1 | AAA | Lc 103.6 | Preferred for body text |
| #221738 text on black | 1.24:1 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F7
oklch(93.6% 0.022 297.4)
-
Step 200
200
#DBD4F2
oklch(88.5% 0.041 296.2)
-
Step 300
300
#C5B7EB
oklch(80.9% 0.074 297.1)
-
Step 400
400
#A890E1
oklch(70.6% 0.118 296.9)
-
Step 500
500
#9473D8
oklch(63.1% 0.15 297)
-
Step 600
600
#7F59C6
oklch(55.6% 0.164 296.8)
-
Step 700
700
#6B48AB
oklch(49% 0.152 296.7)
-
Step 800
800
#573C8A
oklch(42.7% 0.125 296.7)
-
Step 900
900
#48346F
oklch(37.8% 0.099 297.1)
-
Step 950
950 (this color)
#221738
oklch(23.7% 0.062 296.8)
#221738 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) | #0B1D39 | 0.040 |
| Deuteranopia (no green cones) | #0E1D37 | 0.037 |
| Tritanopia (no blue cones) | #1D1D24 | 0.049 |
| Achromatopsia (no color) | #1D1D1D | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #221738
#221738
oklch(23.7% 0.062 296.8)
- #1D2200
#1D2200
oklch(23.8% 0.055 117.5)
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 #221738, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.048
- Dark #1B2431 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.049
- Midnight Purple #280137 ΔE 0.054
- Very Dark Purple #2A0134 ΔE 0.055
- Dark Purple #35063E ΔE 0.055
- Eggplant #380835 ΔE 0.056
- Jet #212529 ΔE 0.061
Use #221738 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.