#28557F
Closest named color: Light Navy Blue (#2E5A88). oklch(43.8% 0.086 249), rgb(40, 85, 127).
Aa
White text reads best on this color (7.78:1).
About this color
#28557F is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.086 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.021 away. White text reads best on it, at 7.78:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.69:1 |
| White text | 7.78:1 |
Values
| HEX | #28557F |
| RGB | rgb(40, 85, 127) |
| HSL | hsl(209, 52%, 33%) |
| OKLCH | oklch(43.8% 0.086 249) |
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 #28557F | 7.78:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #28557F | 2.69:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #28557F text on white | 7.78:1 | AAA | Lc 86.8 | Fine for body text |
| #28557F text on black | 2.69:1 | Fails | Lc -15.3 | Dividers and decoration only |
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
#A8C4E0
oklch(80.9% 0.05 248.4)
-
Step 400
400
#79A5D1
oklch(70.7% 0.08 249)
-
Step 500
500
#558EC5
oklch(63.1% 0.103 248.9)
-
Step 600
600
#3977B1
oklch(55.5% 0.111 249.1)
-
Step 700
700
#2B6498
oklch(49.1% 0.103 248.9)
-
Step 800
800 (this color)
#28557F
oklch(43.8% 0.086 249)
-
Step 900
900
#234463
oklch(37.7% 0.066 248.6)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#28557F 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) | #435781 | 0.032 |
| Deuteranopia (no green cones) | #374E7E | 0.024 |
| Tritanopia (no blue cones) | #005F64 | 0.066 |
| Achromatopsia (no color) | #525252 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28557F
#28557F
oklch(43.8% 0.086 249)
- #704813
#704813
oklch(43.8% 0.085 68.8)
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 #28557F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.021
- Deep Sea Blue #015482 ΔE 0.022
- Light Navy #155084 ΔE 0.025
- Dusk Blue #26538D ΔE 0.025
- YInMn Blue #415A77 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.041
- Dusk #4E5481 ΔE 0.046
- Denim #3B638C ΔE 0.051
Use #28557F 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.