#21225B
Closest named color: Marine (#042E60). oklch(28.9% 0.1 277.4), rgb(33, 34, 91).
Aa
White text reads best on this color (14.53:1).
About this color
#21225B is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.100 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.041 away. White text reads best on it, at 14.53:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.44:1 |
| White text | 14.53:1 |
Values
| HEX | #21225B |
| RGB | rgb(33, 34, 91) |
| HSL | hsl(239, 47%, 24%) |
| OKLCH | oklch(28.9% 0.1 277.4) |
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 #21225B | 14.53:1 | AAA | Lc -104.0 | Preferred for body text |
| Black text on #21225B | 1.44:1 | Fails | Lc 0.0 | Not readable |
| #21225B text on white | 14.53:1 | AAA | Lc 101.1 | Preferred for body text |
| #21225B text on black | 1.44:1 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E8FF
oklch(93.5% 0.031 277.9)
-
Step 200
200
#CFD6FF
oklch(88.4% 0.057 277.5)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400
#8A95FF
oklch(70.7% 0.154 277.2)
-
Step 500
500
#7075FF
oklch(63.1% 0.201 277.4)
-
Step 600
600
#5B50FF
oklch(55.7% 0.248 277.4)
-
Step 700
700
#4C39E6
oklch(49.2% 0.244 277.4)
-
Step 800
800
#3D31B9
oklch(42.6% 0.202 277.4)
-
Step 900
900
#332F92
oklch(37.8% 0.157 277.5)
-
Step 950
950 (this color)
#21225B
oklch(28.9% 0.1 277.4)
#21225B 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) | #002C5D | 0.039 |
| Deuteranopia (no green cones) | #00275A | 0.036 |
| Tritanopia (no blue cones) | #00303A | 0.088 |
| Achromatopsia (no color) | #292929 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21225B
#21225B
oklch(28.9% 0.1 277.4)
- #332B00
#332B00
oklch(28.9% 0.06 98.2)
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 #21225B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.041
- Midnight Blue #191970 ΔE 0.045
- Dark Indigo #1F0954 ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.064
- Marine Blue #01386A ΔE 0.067
- Darkblue #030764 ΔE 0.076
Use #21225B 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.