#28637E
Closest named color: Denim (#3B638C). oklch(47.3% 0.075 231.1), rgb(40, 99, 126).
Aa
White text reads best on this color (6.61:1).
About this color
#28637E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.075 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.031 away. White text reads best on it, at 6.61:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #28637E |
| RGB | rgb(40, 99, 126) |
| HSL | hsl(199, 52%, 33%) |
| OKLCH | oklch(47.3% 0.075 231.1) |
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 #28637E | 6.61:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #28637E | 3.17:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #28637E text on white | 6.61:1 | AA | Lc 82.5 | Fine for body text |
| #28637E text on black | 3.17:1 | AA large text | Lc -19.4 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#AAC5D4
oklch(80.8% 0.036 232.2)
-
Step 400
400
#7CA8BE
oklch(70.8% 0.057 230.2)
-
Step 500
500
#5992AE
oklch(63.2% 0.073 230.8)
-
Step 600
600
#3C7C9A
oklch(55.7% 0.08 230.9)
-
Step 700
700 (this color)
#28637E
oklch(47.3% 0.075 231.1)
-
Step 800
800
#27556B
oklch(42.7% 0.062 231.5)
-
Step 900
900
#254657
oklch(37.7% 0.048 232.5)
-
Step 950
950
#162933
oklch(26.9% 0.031 232.5)
#28637E 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) | #55627F | 0.050 |
| Deuteranopia (no green cones) | #4A597E | 0.044 |
| Tritanopia (no blue cones) | #006A6C | 0.046 |
| Achromatopsia (no color) | #5D5D5D | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28637E
#28637E
oklch(47.3% 0.075 231.1)
- #7D4F33
#7D4F33
oklch(47.3% 0.075 51.4)
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 #28637E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.031
- YInMn Blue #415A77 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.036
- Peacock Blue #016795 ΔE 0.038
- Petrol #005F6A ΔE 0.041
- Dark Aqua #05696B ΔE 0.045
- Slate #516572 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.049
Use #28637E 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.