#201737
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.06 294.2), rgb(32, 23, 55).
Aa
White text reads best on this color (16.94:1).
About this color
#201737 is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.060 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.045 away. White text reads best on it, at 16.94:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.060) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.94:1 |
Values
| HEX | #201737 |
| RGB | rgb(32, 23, 55) |
| HSL | hsl(257, 41%, 15%) |
| OKLCH | oklch(23.4% 0.06 294.2) |
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 #201737 | 16.94:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #201737 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #201737 text on white | 16.94:1 | AAA | Lc 103.8 | Preferred for body text |
| #201737 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EAE7F7
oklch(93.5% 0.022 294.6)
-
Step 200
200
#DAD5F1
oklch(88.6% 0.038 293.8)
-
Step 300
300
#C3B8EB
oklch(80.9% 0.072 294.6)
-
Step 400
400
#A592E0
oklch(70.7% 0.113 294.5)
-
Step 500
500
#9075D8
oklch(63.1% 0.146 294.4)
-
Step 600
600
#7B5CC5
oklch(55.7% 0.158 294.3)
-
Step 700
700
#684BAA
oklch(49.2% 0.146 294.5)
-
Step 800
800
#543E8A
oklch(42.7% 0.122 294)
-
Step 900
900
#45356E
oklch(37.6% 0.095 294.3)
-
Step 950
950 (this color)
#201737
oklch(23.4% 0.06 294.2)
#201737 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) | #0B1D38 | 0.036 |
| Deuteranopia (no green cones) | #0D1C36 | 0.034 |
| Tritanopia (no blue cones) | #1B1D24 | 0.048 |
| Achromatopsia (no color) | #1D1D1D | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #201737
#201737
oklch(23.4% 0.06 294.2)
- #1E2000
#1E2000
oklch(23.3% 0.052 113.1)
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 #201737, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.045
- Dark #1B2431 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.048
- Midnight Purple #280137 ΔE 0.055
- Very Dark Purple #2A0134 ΔE 0.056
- Dark Purple #35063E ΔE 0.058
- Eggplant #380835 ΔE 0.060
- Jet #212529 ΔE 0.061
Use #201737 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.