#212D5F
Closest named color: Marine (#042E60). oklch(31.6% 0.09 270.4), rgb(33, 45, 95).
Aa
White text reads best on this color (13.08:1).
About this color
#212D5F is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.090 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.027 away. White text reads best on it, at 13.08:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.60:1 |
| White text | 13.08:1 |
Values
| HEX | #212D5F |
| RGB | rgb(33, 45, 95) |
| HSL | hsl(228, 48%, 25%) |
| OKLCH | oklch(31.6% 0.09 270.4) |
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 #212D5F | 13.08:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #212D5F | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #212D5F text on white | 13.08:1 | AAA | Lc 99.2 | Preferred for body text |
| #212D5F text on black | 1.60:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
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
#7D99FF
oklch(70.7% 0.152 270.5)
-
Step 500
500
#5E7BFF
oklch(63.1% 0.198 270.4)
-
Step 600
600
#455BFA
oklch(55.6% 0.235 270.4)
-
Step 700
700
#3849DA
oklch(49.2% 0.219 270.5)
-
Step 800
800
#2D3DB0
oklch(42.6% 0.182 270.3)
-
Step 900
900
#27368B
oklch(37.6% 0.142 270.4)
-
Step 950
950 (this color)
#212D5F
oklch(31.6% 0.09 270.4)
#212D5F 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) | #133461 | 0.023 |
| Deuteranopia (no green cones) | #072E5E | 0.025 |
| Tritanopia (no blue cones) | #003841 | 0.077 |
| Achromatopsia (no color) | #313131 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212D5F
#212D5F
oklch(31.6% 0.09 270.4)
- #3E3000
#3E3000
oklch(31.6% 0.065 91.1)
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 #212D5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.027
- Prussian Blue #1D3557 ΔE 0.031
- Marine Blue #01386A ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.060
- Midnight Blue #191970 ΔE 0.061
- Gunmetal #293241 ΔE 0.061
- Midnight Green #073B4C ΔE 0.065
Use #212D5F 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.