#21234F
Closest named color: Oxford Blue (#1B263B). oklch(28.1% 0.079 278), rgb(33, 35, 79).
Aa
White text reads best on this color (14.80:1).
About this color
#21234F is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.079 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.042 away. White text reads best on it, at 14.80:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.41:1 |
| White text | 14.80:1 |
Values
| HEX | #21234F |
| RGB | rgb(33, 35, 79) |
| HSL | hsl(237, 41%, 22%) |
| OKLCH | oklch(28.1% 0.079 278) |
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 #21234F | 14.80:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #21234F | 1.41:1 | Fails | Lc 0.0 | Not readable |
| #21234F text on white | 14.80:1 | AAA | Lc 101.5 | Preferred for body text |
| #21234F 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
#D0D7FC
oklch(88.6% 0.052 276.9)
-
Step 300
300
#B2BBFD
oklch(80.9% 0.094 278.1)
-
Step 400
400
#8C95FC
oklch(70.7% 0.15 278.1)
-
Step 500
500
#7276FA
oklch(63% 0.193 278)
-
Step 600
600
#5D5BE9
oklch(55.6% 0.208 277.8)
-
Step 700
700
#4E49CA
oklch(49.1% 0.193 278.2)
-
Step 800
800
#3F3DA4
oklch(42.7% 0.161 278)
-
Step 900
900
#353682
oklch(37.8% 0.125 278)
-
Step 950
950 (this color)
#21234F
oklch(28.1% 0.079 278)
#21234F 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) | #0D2A51 | 0.030 |
| Deuteranopia (no green cones) | #07264E | 0.031 |
| Tritanopia (no blue cones) | #0C2D35 | 0.070 |
| Achromatopsia (no color) | #282828 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21234F
#21234F
oklch(28.1% 0.079 278)
- #312900
#312900
oklch(28.1% 0.058 97.8)
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 #21234F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.042
- Marine #042E60 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.055
- Dark #1B2431 ΔE 0.059
- Dark Indigo #1F0954 ΔE 0.061
- Gunmetal #293241 ΔE 0.062
- Midnight Blue #191970 ΔE 0.066
Use #21234F 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.