#212A57
Closest named color: Marine (#042E60). oklch(30.3% 0.081 272.2), rgb(33, 42, 87).
Aa
White text reads best on this color (13.69:1).
About this color
#212A57 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.081 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.031 away. White text reads best on it, at 13.69:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.53:1 |
| White text | 13.69:1 |
Values
| HEX | #212A57 |
| RGB | rgb(33, 42, 87) |
| HSL | hsl(230, 45%, 24%) |
| OKLCH | oklch(30.3% 0.081 272.2) |
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 #212A57 | 13.69:1 | AAA | Lc -103.2 | Preferred for body text |
| Black text on #212A57 | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #212A57 text on white | 13.69:1 | AAA | Lc 100.1 | Preferred for body text |
| #212A57 text on black | 1.53:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CCD8FE
oklch(88.5% 0.054 271.5)
-
Step 300
300
#ABBDFF
oklch(80.9% 0.096 272.3)
-
Step 400
400
#8098FF
oklch(70.7% 0.153 272.1)
-
Step 500
500
#637AFE
oklch(63.1% 0.196 272.1)
-
Step 600
600
#4D5EEE
oklch(55.6% 0.215 272.2)
-
Step 700
700
#3F4CCF
oklch(49% 0.2 272.2)
-
Step 800
800
#3440A7
oklch(42.8% 0.164 272.3)
-
Step 900
900
#2C3884
oklch(37.7% 0.128 272.1)
-
Step 950
950 (this color)
#212A57
oklch(30.3% 0.081 272.2)
#212A57 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) | #143059 | 0.022 |
| Deuteranopia (no green cones) | #0C2B56 | 0.024 |
| Tritanopia (no blue cones) | #01343C | 0.072 |
| Achromatopsia (no color) | #2D2D2D | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212A57
#212A57
oklch(30.3% 0.081 272.2)
- #3A2D00
#3A2D00
oklch(30.3% 0.062 91.5)
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 #212A57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.044
- Marine Blue #01386A ΔE 0.052
- Oxford Blue #1B263B ΔE 0.053
- Gunmetal #293241 ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.061
- Midnight Blue #191970 ΔE 0.064
Use #212A57 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.