#28639F
Closest named color: Peacock Blue (#016795). oklch(49.1% 0.114 251.6), rgb(40, 99, 159).
Aa
White text reads best on this color (6.22:1).
About this color
#28639F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.114 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.028 away. White text reads best on it, at 6.22:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.37:1 |
| White text | 6.22:1 |
Values
| HEX | #28639F |
| RGB | rgb(40, 99, 159) |
| HSL | hsl(210, 60%, 39%) |
| OKLCH | oklch(49.1% 0.114 251.6) |
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 #28639F | 6.22:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #28639F | 3.37:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #28639F text on white | 6.22:1 | AA | Lc 80.7 | Fine for body text |
| #28639F text on black | 3.37:1 | AA large text | Lc -21.2 | 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
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CBDBED
oklch(88.5% 0.03 251.3)
-
Step 300
300
#A7C4E4
oklch(81% 0.055 251.1)
-
Step 400
400
#77A4D6
oklch(70.6% 0.088 251.7)
-
Step 500
500
#538DCB
oklch(63.1% 0.112 251.5)
-
Step 600
600
#3676B8
oklch(55.6% 0.122 251.5)
-
Step 700
700 (this color)
#28639F
oklch(49.1% 0.114 251.6)
-
Step 800
800
#235181
oklch(42.8% 0.095 251.8)
-
Step 900
900
#224367
oklch(37.6% 0.073 252.1)
-
Step 950
950
#14283C
oklch(27.1% 0.046 249.9)
#28639F 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) | #4767A1 | 0.034 |
| Deuteranopia (no green cones) | #355C9E | 0.021 |
| Tritanopia (no blue cones) | #007179 | 0.086 |
| Achromatopsia (no color) | #616161 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28639F
#28639F
oklch(49.1% 0.114 251.6)
- #855500
#855500
oklch(49.1% 0.105 71.8)
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 #28639F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.030
- Dusky Blue #475F94 ΔE 0.033
- Denim #3B638C ΔE 0.034
- Mid Blue #276AB3 ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.041
- French Blue #436BAD ΔE 0.042
- Ocean Blue #03719C ΔE 0.043
Use #28639F 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.