#28316B
Closest named color: Marine Blue (#01386A). oklch(34% 0.101 273.2), rgb(40, 49, 107).
Aa
White text reads best on this color (12.05:1).
About this color
#28316B is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.101 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.037 away. White text reads best on it, at 12.05:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.05:1 |
Values
| HEX | #28316B |
| RGB | rgb(40, 49, 107) |
| HSL | hsl(232, 46%, 29%) |
| OKLCH | oklch(34% 0.101 273.2) |
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 #28316B | 12.05:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #28316B | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #28316B text on white | 12.05:1 | AAA | Lc 97.3 | Preferred for body text |
| #28316B text on black | 1.74:1 | 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 900.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F6
oklch(88.6% 0.042 273.7)
-
Step 300
300
#B0BEF2
oklch(80.9% 0.075 272.9)
-
Step 400
400
#889BEC
oklch(70.8% 0.121 272.9)
-
Step 500
500
#6C7FE6
oklch(63% 0.155 273.3)
-
Step 600
600
#5666D4
oklch(55.6% 0.168 273.4)
-
Step 700
700
#4654B8
oklch(49.1% 0.157 273.2)
-
Step 800
800
#3A4695
oklch(42.9% 0.129 273.2)
-
Step 900
900 (this color)
#28316B
oklch(34% 0.101 273.2)
-
Step 950
950
#1D2345
oklch(27% 0.063 273.9)
#28316B 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) | #11396D | 0.030 |
| Deuteranopia (no green cones) | #02336A | 0.035 |
| Tritanopia (no blue cones) | #003E49 | 0.087 |
| Achromatopsia (no color) | #363636 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28316B
#28316B
oklch(34% 0.101 273.2)
- #443600
#443600
oklch(33.8% 0.069 92.7)
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 #28316B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.042
- Marine #042E60 ΔE 0.044
- Twilight Blue #0A437A ΔE 0.056
- Midnight Blue #191970 ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.072
- Midnight Green #073B4C ΔE 0.075
Use #28316B 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.