#28386D
Closest named color: Marine Blue (#01386A). oklch(35.7% 0.094 268.7), rgb(40, 56, 109).
Aa
White text reads best on this color (11.18:1).
About this color
#28386D is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.094 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.034 away. White text reads best on it, at 11.18:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.87:1 |
| White text | 11.18:1 |
Values
| HEX | #28386D |
| RGB | rgb(40, 56, 109) |
| HSL | hsl(226, 46%, 29%) |
| OKLCH | oklch(35.7% 0.094 268.7) |
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 #28386D | 11.18:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #28386D | 1.87:1 | Fails | Lc 8.2 | Not readable |
| #28386D text on white | 11.18:1 | AAA | Lc 95.7 | Preferred for body text |
| #28386D text on black | 1.87:1 | 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
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#AEC0EF
oklch(81% 0.07 268.5)
-
Step 400
400
#839DE7
oklch(70.6% 0.113 268.7)
-
Step 500
500
#6583E0
oklch(63% 0.144 268.6)
-
Step 600
600
#4E6BCE
oklch(55.7% 0.156 268.7)
-
Step 700
700
#3F58B2
oklch(49% 0.146 268.8)
-
Step 800
800
#344990
oklch(42.8% 0.12 268.6)
-
Step 900
900 (this color)
#28386D
oklch(35.7% 0.094 268.7)
-
Step 950
950
#1A2443
oklch(26.9% 0.06 268.7)
#28386D 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) | #1F3E6F | 0.019 |
| Deuteranopia (no green cones) | #14386C | 0.022 |
| Tritanopia (no blue cones) | #00444D | 0.082 |
| Achromatopsia (no color) | #3B3B3B | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28386D
#28386D
oklch(35.7% 0.094 268.7)
- #4C3A00
#4C3A00
oklch(35.8% 0.073 89.1)
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 #28386D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.034
- Twilight Blue #0A437A ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.042
- Marine #042E60 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.061
- Cobalt #1E488F ΔE 0.068
- Midnight Green #073B4C ΔE 0.070
Use #28386D 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.