#212F4D
Closest named color: Prussian Blue (#1D3557). oklch(30.8% 0.058 264.3), rgb(33, 47, 77).
Aa
White text reads best on this color (13.30:1).
About this color
#212F4D is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.058 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.023 away. White text reads best on it, at 13.30:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.57:1 |
| White text | 13.30:1 |
Values
| HEX | #212F4D |
| RGB | rgb(33, 47, 77) |
| HSL | hsl(221, 40%, 22%) |
| OKLCH | oklch(30.8% 0.058 264.3) |
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 #212F4D | 13.30:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #212F4D | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #212F4D text on white | 13.30:1 | AAA | Lc 99.6 | Preferred for body text |
| #212F4D text on black | 1.57:1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ABC1EE
oklch(81% 0.068 264.5)
-
Step 400
400
#7E9FE5
oklch(70.6% 0.11 264.5)
-
Step 500
500
#5E86DD
oklch(63.1% 0.139 264.2)
-
Step 600
600
#456ECB
oklch(55.6% 0.151 264.2)
-
Step 700
700
#375BB0
oklch(49.1% 0.142 264.5)
-
Step 800
800
#2E4B8E
oklch(42.7% 0.116 264.4)
-
Step 900
900
#293F72
oklch(37.7% 0.092 264.8)
-
Step 950
950 (this color)
#212F4D
oklch(30.8% 0.058 264.3)
#212F4D 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) | #23324E | 0.010 |
| Deuteranopia (no green cones) | #1E2E4C | 0.006 |
| Tritanopia (no blue cones) | #0C353A | 0.051 |
| Achromatopsia (no color) | #2F2F2F | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212F4D
#212F4D
oklch(30.8% 0.058 264.3)
- #3D2D06
#3D2D06
oklch(30.8% 0.058 85)
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 #212F4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.023
- Space Cadet #2B2D42 ΔE 0.024
- Gunmetal #293241 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.040
- Oxford Blue #1B263B ΔE 0.042
- Marine #042E60 ΔE 0.043
- Midnight Green #073B4C ΔE 0.044
- Marine Blue #01386A ΔE 0.056
Use #212F4D 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.