#28547D
Closest named color: Deep Sea Blue (#015482). oklch(43.5% 0.084 248.9), rgb(40, 84, 125).
Aa
White text reads best on this color (7.91:1).
About this color
#28547D is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.084 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.022 away. White text reads best on it, at 7.91:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.65:1 |
| White text | 7.91:1 |
Values
| HEX | #28547D |
| RGB | rgb(40, 84, 125) |
| HSL | hsl(209, 52%, 32%) |
| OKLCH | oklch(43.5% 0.084 248.9) |
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 #28547D | 7.91:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #28547D | 2.65:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #28547D text on white | 7.91:1 | AAA | Lc 87.2 | Fine for body text |
| #28547D text on black | 2.65:1 | Fails | Lc -14.9 | 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
#A9C4E0
oklch(80.9% 0.049 249.4)
-
Step 400
400
#7AA5D0
oklch(70.7% 0.079 249)
-
Step 500
500
#578EC3
oklch(63.1% 0.099 248.8)
-
Step 600
600
#3A77B0
oklch(55.5% 0.109 249)
-
Step 700
700
#2C6497
oklch(49.1% 0.101 248.8)
-
Step 800
800 (this color)
#28547D
oklch(43.5% 0.084 248.9)
-
Step 900
900
#244463
oklch(37.7% 0.066 249.2)
-
Step 950
950
#16283A
oklch(27.1% 0.041 249.6)
#28547D 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) | #42567F | 0.031 |
| Deuteranopia (no green cones) | #364E7C | 0.021 |
| Tritanopia (no blue cones) | #005E63 | 0.065 |
| Achromatopsia (no color) | #515151 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28547D
#28547D
oklch(43.5% 0.084 248.9)
- #6F4714
#6F4714
oklch(43.4% 0.084 68)
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 #28547D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.022
- Light Navy #155084 ΔE 0.024
- Light Navy Blue #2E5A88 ΔE 0.025
- Dusk Blue #26538D ΔE 0.028
- YInMn Blue #415A77 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.045
- Dusk #4E5481 ΔE 0.048
- Cobalt #1E488F ΔE 0.052
Use #28547D 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.