#28639D
Closest named color: Peacock Blue (#016795). oklch(49% 0.111 250.9), rgb(40, 99, 157).
Aa
White text reads best on this color (6.24:1).
About this color
#28639D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.111 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.025 away. White text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.36:1 |
| White text | 6.24:1 |
Values
| HEX | #28639D |
| RGB | rgb(40, 99, 157) |
| HSL | hsl(210, 59%, 39%) |
| OKLCH | oklch(49% 0.111 250.9) |
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 #28639D | 6.24:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #28639D | 3.36:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #28639D text on white | 6.24:1 | AA | Lc 80.8 | Fine for body text |
| #28639D text on black | 3.36:1 | AA large text | Lc -21.0 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBED
oklch(88.5% 0.03 251.3)
-
Step 300
300
#A7C4E3
oklch(80.9% 0.054 250.2)
-
Step 400
400
#78A5D5
oklch(70.8% 0.086 250.7)
-
Step 500
500
#538DCA
oklch(63% 0.111 251.1)
-
Step 600
600
#3676B7
oklch(55.5% 0.121 251.2)
-
Step 700
700 (this color)
#28639D
oklch(49% 0.111 250.9)
-
Step 800
800
#23517F
oklch(42.6% 0.092 250.9)
-
Step 900
900
#224466
oklch(37.8% 0.071 250.2)
-
Step 950
950
#14283C
oklch(27.1% 0.046 249.9)
#28639D 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) | #48669F | 0.034 |
| Deuteranopia (no green cones) | #375C9C | 0.022 |
| Tritanopia (no blue cones) | #007178 | 0.085 |
| Achromatopsia (no color) | #606060 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28639D
#28639D
oklch(49% 0.111 250.9)
- #855400
#855400
oklch(48.9% 0.105 70.8)
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 #28639D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.028
- Denim #3B638C ΔE 0.031
- Dusky Blue #475F94 ΔE 0.032
- Mid Blue #276AB3 ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.038
- Ocean Blue #03719C ΔE 0.042
- French Blue #436BAD ΔE 0.044
Use #28639D 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.