#28638F
Closest named color: Denim (#3B638C). oklch(48.2% 0.093 244.2), rgb(40, 99, 143).
Aa
White text reads best on this color (6.41:1).
About this color
#28638F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.093 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.017 away. White text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #28638F |
| RGB | rgb(40, 99, 143) |
| HSL | hsl(206, 56%, 36%) |
| OKLCH | oklch(48.2% 0.093 244.2) |
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 #28638F | 6.41:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #28638F | 3.27:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #28638F text on white | 6.41:1 | AA | Lc 81.6 | Fine for body text |
| #28638F text on black | 3.27:1 | AA large text | Lc -20.3 | 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 700.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE9
oklch(88.4% 0.025 246.2)
-
Step 300
300
#A9C4DC
oklch(80.8% 0.045 245.2)
-
Step 400
400
#7AA6CB
oklch(70.7% 0.072 244.4)
-
Step 500
500
#568FBE
oklch(63% 0.093 244.9)
-
Step 600
600
#3979AA
oklch(55.6% 0.101 244.2)
-
Step 700
700 (this color)
#28638F
oklch(48.2% 0.093 244.2)
-
Step 800
800
#255376
oklch(42.7% 0.077 244.1)
-
Step 900
900
#23455F
oklch(37.7% 0.06 243.4)
-
Step 950
950
#152838
oklch(26.9% 0.039 245.4)
#28638F 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) | #4F6491 | 0.042 |
| Deuteranopia (no green cones) | #415A8E | 0.033 |
| Tritanopia (no blue cones) | #006E72 | 0.069 |
| Achromatopsia (no color) | #5F5F5F | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28638F
#28638F
oklch(48.2% 0.093 244.2)
- #82511C
#82511C
oklch(48.1% 0.093 63.8)
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 #28638F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.017
- Peacock Blue #016795 ΔE 0.019
- Light Navy Blue #2E5A88 ΔE 0.026
- Denim Blue #3B5B92 ΔE 0.029
- Dusky Blue #475F94 ΔE 0.034
- Ocean Blue #03719C ΔE 0.042
- YInMn Blue #415A77 ΔE 0.045
- Dusk Blue #26538D ΔE 0.048
Use #28638F 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.