#212F4B
Closest named color: Space Cadet (#2B2D42). oklch(30.7% 0.054 263.3), rgb(33, 47, 75).
Aa
White text reads best on this color (13.35:1).
About this color
#212F4B is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.054 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.021 away. White text reads best on it, at 13.35:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.57:1 |
| White text | 13.35:1 |
Values
| HEX | #212F4B |
| RGB | rgb(33, 47, 75) |
| HSL | hsl(220, 39%, 21%) |
| OKLCH | oklch(30.7% 0.054 263.3) |
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 #212F4B | 13.35:1 | AAA | Lc -102.9 | Preferred for body text |
| Black text on #212F4B | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #212F4B text on white | 13.35:1 | AAA | Lc 99.7 | Preferred for body text |
| #212F4B 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF2
oklch(88.6% 0.036 262.8)
-
Step 300
300
#ABC1EB
oklch(80.9% 0.064 263.3)
-
Step 400
400
#7FA0E1
oklch(70.7% 0.103 263.3)
-
Step 500
500
#5F87D9
oklch(63.1% 0.132 263.4)
-
Step 600
600
#466FC6
oklch(55.6% 0.143 263.5)
-
Step 700
700
#375DAB
oklch(49.2% 0.132 262.9)
-
Step 800
800
#2E4C8B
oklch(42.7% 0.111 263.3)
-
Step 900
900
#29406F
oklch(37.8% 0.086 263.2)
-
Step 950
950 (this color)
#212F4B
oklch(30.7% 0.054 263.3)
#212F4B 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) | #24314C | 0.008 |
| Deuteranopia (no green cones) | #1F2D4A | 0.007 |
| Tritanopia (no blue cones) | #0E3539 | 0.049 |
| Achromatopsia (no color) | #2F2F2F | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212F4B
#212F4B
oklch(30.7% 0.054 263.3)
- #3D2D0A
#3D2D0A
oklch(30.8% 0.054 83.3)
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 #212F4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.025
- Gunmetal #293241 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.039
- Oxford Blue #1B263B ΔE 0.040
- Midnight Green #073B4C ΔE 0.043
- Marine #042E60 ΔE 0.046
- Dark #1B2431 ΔE 0.056
Use #212F4B 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.