#21204E
Closest named color: Oxford Blue (#1B263B). oklch(27.3% 0.082 280.4), rgb(33, 32, 78).
Aa
White text reads best on this color (15.20:1).
About this color
#21204E is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.082 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.044 away. White text reads best on it, at 15.20:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.38:1 |
| White text | 15.20:1 |
Values
| HEX | #21204E |
| RGB | rgb(33, 32, 78) |
| HSL | hsl(241, 42%, 22%) |
| OKLCH | oklch(27.3% 0.082 280.4) |
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 #21204E | 15.20:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #21204E | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #21204E text on white | 15.20:1 | AAA | Lc 101.9 | Preferred for body text |
| #21204E text on black | 1.38:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FD
oklch(93.6% 0.028 281.5)
-
Step 200
200
#D2D6FD
oklch(88.5% 0.054 280.6)
-
Step 300
300
#B4BAFF
oklch(80.9% 0.098 280.1)
-
Step 400
400
#9093FF
oklch(70.8% 0.156 280.4)
-
Step 500
500
#7773FD
oklch(63.1% 0.199 280.3)
-
Step 600
600
#6356EC
oklch(55.5% 0.217 280.5)
-
Step 700
700
#5345CE
oklch(49.1% 0.202 280.5)
-
Step 800
800
#433AA6
oklch(42.7% 0.167 280.4)
-
Step 900
900
#383484
oklch(37.8% 0.13 280.4)
-
Step 950
950 (this color)
#21204E
oklch(27.3% 0.082 280.4)
#21204E 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) | #062750 | 0.035 |
| Deuteranopia (no green cones) | #02244D | 0.037 |
| Tritanopia (no blue cones) | #0E2A33 | 0.071 |
| Achromatopsia (no color) | #262626 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21204E
#21204E
oklch(27.3% 0.082 280.4)
- #2E2800
#2E2800
oklch(27.5% 0.057 100.7)
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 #21204E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.044
- Dark Indigo #1F0954 ΔE 0.053
- Marine #042E60 ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.055
- Dark #1B2431 ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.064
- Midnight Blue #191970 ΔE 0.065
- Gunmetal #293241 ΔE 0.069
Use #21204E 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.