#21234E
Closest named color: Oxford Blue (#1B263B). oklch(28% 0.078 278.1), rgb(33, 35, 78).
Aa
White text reads best on this color (14.84:1).
About this color
#21234E is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.078 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.040 away. White text reads best on it, at 14.84:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.41:1 |
| White text | 14.84:1 |
Values
| HEX | #21234E |
| RGB | rgb(33, 35, 78) |
| HSL | hsl(237, 41%, 22%) |
| OKLCH | oklch(28% 0.078 278.1) |
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 #21234E | 14.84:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #21234E | 1.41:1 | Fails | Lc 0.0 | Not readable |
| #21234E text on white | 14.84:1 | AAA | Lc 101.6 | Preferred for body text |
| #21234E text on black | 1.41:1 | 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
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D1D7FB
oklch(88.6% 0.05 277.9)
-
Step 300
300
#B2BBFC
oklch(80.8% 0.092 278)
-
Step 400
400
#8C95FA
oklch(70.6% 0.147 278.1)
-
Step 500
500
#7377F7
oklch(63.1% 0.187 278.2)
-
Step 600
600
#5E5CE6
oklch(55.6% 0.203 278.1)
-
Step 700
700
#4E4AC8
oklch(49.1% 0.19 278.2)
-
Step 800
800
#3F3EA2
oklch(42.7% 0.157 277.9)
-
Step 900
900
#353680
oklch(37.6% 0.122 278.2)
-
Step 950
950 (this color)
#21234E
oklch(28% 0.078 278.1)
#21234E 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) | #0E2950 | 0.028 |
| Deuteranopia (no green cones) | #09264D | 0.030 |
| Tritanopia (no blue cones) | #0D2C34 | 0.068 |
| Achromatopsia (no color) | #282828 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21234E
#21234E
oklch(28% 0.078 278.1)
- #302900
#302900
oklch(28% 0.058 99.3)
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 #21234E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.047
- Marine #042E60 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.055
- Dark #1B2431 ΔE 0.057
- Gunmetal #293241 ΔE 0.061
- Dark Indigo #1F0954 ΔE 0.062
- Midnight Blue #191970 ΔE 0.067
Use #21234E 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.