#212D72
Closest named color: Marine Blue (#01386A). oklch(33.2% 0.119 270.9), rgb(33, 45, 114).
Aa
White text reads best on this color (12.47:1).
About this color
#212D72 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.119 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.040 away. White text reads best on it, at 12.47:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.68:1 |
| White text | 12.47:1 |
Values
| HEX | #212D72 |
| RGB | rgb(33, 45, 114) |
| HSL | hsl(231, 55%, 29%) |
| OKLCH | oklch(33.2% 0.119 270.9) |
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 #212D72 | 12.47:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #212D72 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #212D72 text on white | 12.47:1 | AAA | Lc 98.0 | Preferred for body text |
| #212D72 text on black | 1.68:1 | 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 900.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FB
oklch(88.5% 0.05 271.6)
-
Step 300
300
#ABBEFB
oklch(80.9% 0.089 270.9)
-
Step 400
400
#809AF9
oklch(70.7% 0.142 270.8)
-
Step 500
500
#627DF6
oklch(63.1% 0.182 270.9)
-
Step 600
600
#4C63E5
oklch(55.7% 0.198 270.9)
-
Step 700
700
#3D51C7
oklch(49.1% 0.184 270.7)
-
Step 800
800
#3243A1
oklch(42.7% 0.153 270.7)
-
Step 900
900 (this color)
#212D72
oklch(33.2% 0.119 270.9)
-
Step 950
950
#19224B
oklch(26.9% 0.077 271.1)
#212D72 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) | #003874 | 0.035 |
| Deuteranopia (no green cones) | #003071 | 0.028 |
| Tritanopia (no blue cones) | #003E4A | 0.098 |
| Achromatopsia (no color) | #343434 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212D72
#212D72
oklch(33.2% 0.119 270.9)
- #433400
#433400
oklch(33.2% 0.068 90.9)
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 #212D72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.040
- Marine #042E60 ΔE 0.043
- Midnight Blue #191970 ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.062
- Royal #0C1793 ΔE 0.075
- Dark Blue Grey #1F3B4D ΔE 0.084
- Cobalt #1E488F ΔE 0.085
Use #212D72 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.