#212D40
Closest named color: Space Cadet (#2B2D42). oklch(29.5% 0.039 259.4), rgb(33, 45, 64).
Aa
White text reads best on this color (13.87:1).
About this color
#212D40 is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.039 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.017 away. White text reads best on it, at 13.87:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.51:1 |
| White text | 13.87:1 |
Values
| HEX | #212D40 |
| RGB | rgb(33, 45, 64) |
| HSL | hsl(217, 32%, 19%) |
| OKLCH | oklch(29.5% 0.039 259.4) |
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 #212D40 | 13.87:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #212D40 | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #212D40 text on white | 13.87:1 | AAA | Lc 100.4 | Preferred for body text |
| #212D40 text on black | 1.51:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#86A2CF
oklch(70.8% 0.073 259.8)
-
Step 500
500
#678AC2
oklch(63% 0.094 259.5)
-
Step 600
600
#4E73AE
oklch(55.4% 0.102 259.4)
-
Step 700
700
#3F6196
oklch(49.2% 0.094 259)
-
Step 800
800
#344F7A
oklch(42.7% 0.079 259.4)
-
Step 900
900
#2E4262
oklch(37.8% 0.061 259.5)
-
Step 950
950 (this color)
#212D40
oklch(29.5% 0.039 259.4)
#212D40 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) | #262E41 | 0.009 |
| Deuteranopia (no green cones) | #232B40 | 0.007 |
| Tritanopia (no blue cones) | #163134 | 0.033 |
| Achromatopsia (no color) | #2C2C2C | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212D40
#212D40
oklch(29.5% 0.039 259.4)
- #372A15
#372A15
oklch(29.4% 0.039 78.4)
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 #212D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.017
- Gunmetal #293241 ΔE 0.022
- Oxford Blue #1B263B ΔE 0.027
- Dark #1B2431 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.044
- Jet #212529 ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.047
- Midnight Green #073B4C ΔE 0.048
Use #212D40 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.