#28517C
Closest named color: Light Navy (#155084). oklch(42.7% 0.085 251.5), rgb(40, 81, 124).
Aa
White text reads best on this color (8.20:1).
About this color
#28517C is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.085 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.020 away. White text reads best on it, at 8.20:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.55:1 |
| White text | 8.20:1 |
Values
| HEX | #28517C |
| RGB | rgb(40, 81, 124) |
| HSL | hsl(211, 51%, 32%) |
| OKLCH | oklch(42.7% 0.085 251.5) |
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 #28517C | 8.20:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #28517C | 2.55:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #28517C text on white | 8.20:1 | AAA | Lc 88.2 | Fine for body text |
| #28517C text on black | 2.55:1 | Fails | Lc -14.0 | 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 800.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEB
oklch(88.5% 0.027 249.9)
-
Step 300
300
#AAC3E1
oklch(80.8% 0.051 253.1)
-
Step 400
400
#7CA4D1
oklch(70.6% 0.079 251.9)
-
Step 500
500
#598DC5
oklch(63.1% 0.102 251.4)
-
Step 600
600
#3D76B2
oklch(55.5% 0.111 251.5)
-
Step 700
700
#2F6399
oklch(49% 0.103 251.5)
-
Step 800
800 (this color)
#28517C
oklch(42.7% 0.085 251.5)
-
Step 900
900
#254364
oklch(37.6% 0.067 252.1)
-
Step 950
950
#16283A
oklch(27.1% 0.041 249.6)
#28517C 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) | #3E537E | 0.027 |
| Deuteranopia (no green cones) | #334B7B | 0.020 |
| Tritanopia (no blue cones) | #005B60 | 0.068 |
| Achromatopsia (no color) | #4F4F4F | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28517C
#28517C
oklch(42.7% 0.085 251.5)
- #6C460C
#6C460C
oklch(42.8% 0.086 71.4)
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 #28517C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.020
- Deep Sea Blue #015482 ΔE 0.022
- Dusk Blue #26538D ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.032
- YInMn Blue #415A77 ΔE 0.044
- Cobalt #1E488F ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.050
- Dusk #4E5481 ΔE 0.050
Use #28517C 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.