#2B304B
Closest named color: Space Cadet (#2B2D42). oklch(31.7% 0.049 275.3), rgb(43, 48, 75).
Aa
White text reads best on this color (12.90:1).
About this color
#2B304B is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.049 and its hue 275°. 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 12.90:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.62:1 |
| White text | 12.90:1 |
Values
| HEX | #2B304B |
| RGB | rgb(43, 48, 75) |
| HSL | hsl(231, 27%, 23%) |
| OKLCH | oklch(31.7% 0.049 275.3) |
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 #2B304B | 12.90:1 | AAA | Lc -102.3 | Preferred for body text |
| Black text on #2B304B | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #2B304B text on white | 12.90:1 | AAA | Lc 99.1 | Preferred for body text |
| #2B304B text on black | 1.62:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B5BEE7
oklch(80.8% 0.059 275.3)
-
Step 400
400
#909CDA
oklch(70.7% 0.092 275.4)
-
Step 500
500
#7582D0
oklch(63% 0.118 275.3)
-
Step 600
600
#5F6BBD
oklch(55.7% 0.127 275.2)
-
Step 700
700
#4E59A3
oklch(49.1% 0.118 274.8)
-
Step 800
800
#404984
oklch(42.7% 0.098 274.9)
-
Step 900
900
#363D6A
oklch(37.6% 0.077 275.4)
-
Step 950
950 (this color)
#2B304B
oklch(31.7% 0.049 275.3)
#2B304B 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) | #27334C | 0.011 |
| Deuteranopia (no green cones) | #25304A | 0.010 |
| Tritanopia (no blue cones) | #21353A | 0.043 |
| Achromatopsia (no color) | #323232 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B304B
#2B304B
oklch(31.7% 0.049 275.3)
- #3A3212
#3A3212
oklch(31.8% 0.049 95.4)
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 #2B304B, 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
- Prussian Blue #1D3557 ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.037
- Onyx #343A40 ΔE 0.047
- Midnight Green #073B4C ΔE 0.047
- Oxford Blue #1B263B ΔE 0.050
- Marine #042E60 ΔE 0.057
Use #2B304B 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.