#21224C
Closest named color: Oxford Blue (#1B263B). oklch(27.6% 0.076 279.2), rgb(33, 34, 76).
Aa
White text reads best on this color (15.02:1).
About this color
#21224C is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.076 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.038 away. White text reads best on it, at 15.02:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.02:1 |
Values
| HEX | #21224C |
| RGB | rgb(33, 34, 76) |
| HSL | hsl(239, 39%, 21%) |
| OKLCH | oklch(27.6% 0.076 279.2) |
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 #21224C | 15.02:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #21224C | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #21224C text on white | 15.02:1 | AAA | Lc 101.8 | Preferred for body text |
| #21224C text on black | 1.39:1 | 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
#E6E8FC
oklch(93.5% 0.027 281.3)
-
Step 200
200
#D1D6FA
oklch(88.4% 0.05 279.1)
-
Step 300
300
#B4BBFA
oklch(80.9% 0.089 279.3)
-
Step 400
400
#8F95F8
oklch(70.7% 0.144 279.4)
-
Step 500
500
#7577F5
oklch(63.1% 0.184 279)
-
Step 600
600
#605CE3
oklch(55.6% 0.199 279)
-
Step 700
700
#504AC6
oklch(49% 0.187 279.1)
-
Step 800
800
#413EA0
oklch(42.7% 0.154 279)
-
Step 900
900
#37367F
oklch(37.7% 0.12 279.6)
-
Step 950
950 (this color)
#21224C
oklch(27.6% 0.076 279.2)
#21224C 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) | #0E284E | 0.028 |
| Deuteranopia (no green cones) | #09254B | 0.030 |
| Tritanopia (no blue cones) | #0F2B33 | 0.066 |
| Achromatopsia (no color) | #272727 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21224C
#21224C
oklch(27.6% 0.076 279.2)
- #2F2800
#2F2800
oklch(27.6% 0.057 99.1)
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 #21224C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.048
- Marine #042E60 ΔE 0.052
- Dark #1B2431 ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.059
- Dark Indigo #1F0954 ΔE 0.060
- Gunmetal #293241 ΔE 0.062
- Jet #212529 ΔE 0.069
Use #21224C 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.