#28304A
Closest named color: Space Cadet (#2B2D42). oklch(31.4% 0.048 270.4), rgb(40, 48, 74).
Aa
White text reads best on this color (13.02:1).
About this color
#28304A is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.048 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.015 away. White text reads best on it, at 13.02:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.61:1 |
| White text | 13.02:1 |
Values
| HEX | #28304A |
| RGB | rgb(40, 48, 74) |
| HSL | hsl(226, 30%, 22%) |
| OKLCH | oklch(31.4% 0.048 270.4) |
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 #28304A | 13.02:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #28304A | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #28304A text on white | 13.02:1 | AAA | Lc 99.2 | Preferred for body text |
| #28304A text on black | 1.61:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D1D9EF
oklch(88.6% 0.031 269.8)
-
Step 300
300
#B2BFE6
oklch(80.8% 0.057 270.6)
-
Step 400
400
#8B9EDA
oklch(70.7% 0.091 270.5)
-
Step 500
500
#6F85D0
oklch(63.2% 0.116 270.4)
-
Step 600
600
#576DBD
oklch(55.5% 0.127 270.3)
-
Step 700
700
#485BA3
oklch(49.2% 0.117 270.5)
-
Step 800
800
#3B4A84
oklch(42.6% 0.098 270.8)
-
Step 900
900
#323F6A
oklch(37.8% 0.076 269.8)
-
Step 950
950 (this color)
#28304A
oklch(31.4% 0.048 270.4)
#28304A 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) | #27324B | 0.006 |
| Deuteranopia (no green cones) | #243049 | 0.006 |
| Tritanopia (no blue cones) | #1D3539 | 0.043 |
| Achromatopsia (no color) | #313131 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28304A
#28304A
oklch(31.4% 0.048 270.4)
- #3B3012
#3B3012
oklch(31.4% 0.048 89.3)
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 #28304A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.015
- Gunmetal #293241 ΔE 0.020
- Prussian Blue #1D3557 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.036
- Midnight Green #073B4C ΔE 0.044
- Oxford Blue #1B263B ΔE 0.046
- Onyx #343A40 ΔE 0.047
- Marine #042E60 ΔE 0.055
Use #28304A 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.