#212D7B
Closest named color: Marine Blue (#01386A). oklch(34% 0.132 270.8), rgb(33, 45, 123).
Aa
White text reads best on this color (12.16:1).
About this color
#212D7B is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.132 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.048 away. White text reads best on it, at 12.16:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.72:1 |
| White text | 12.16:1 |
Values
| HEX | #212D7B |
| RGB | rgb(33, 45, 123) |
| HSL | hsl(232, 58%, 31%) |
| OKLCH | oklch(34% 0.132 270.8) |
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 #212D7B | 12.16:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #212D7B | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #212D7B text on white | 12.16:1 | AAA | Lc 97.3 | Preferred for body text |
| #212D7B text on black | 1.72:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FE
oklch(93.5% 0.029 271.1)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#5F7BFF
oklch(63.1% 0.198 270.7)
-
Step 600
600
#485EF1
oklch(55.5% 0.22 270.8)
-
Step 700
700
#3B4CD2
oklch(49.1% 0.205 271)
-
Step 800
800
#3040AA
oklch(42.8% 0.169 270.8)
-
Step 900
900 (this color)
#212D7B
oklch(34% 0.132 270.8)
-
Step 950
950
#18214F
oklch(26.9% 0.085 271.3)
#212D7B 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) | #003A7E | 0.038 |
| Deuteranopia (no green cones) | #003179 | 0.027 |
| Tritanopia (no blue cones) | #00414F | 0.107 |
| Achromatopsia (no color) | #363636 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212D7B
#212D7B
oklch(34% 0.132 270.8)
- #463600
#463600
oklch(34.1% 0.07 90.3)
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 #212D7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.048
- Midnight Blue #191970 ΔE 0.054
- Marine #042E60 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.060
- Royal #0C1793 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.070
- Cobalt #1E488F ΔE 0.078
- Dark Slate Blue #483D8B ΔE 0.082
Use #212D7B 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.