#28558E
Closest named color: Dusk Blue (#26538D). oklch(44.8% 0.106 255.5), rgb(40, 85, 142).
Aa
White text reads best on this color (7.55:1).
About this color
#28558E is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.106 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.006 away. White text reads best on it, at 7.55:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.78:1 |
| White text | 7.55:1 |
Values
| HEX | #28558E |
| RGB | rgb(40, 85, 142) |
| HSL | hsl(214, 56%, 36%) |
| OKLCH | oklch(44.8% 0.106 255.5) |
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 #28558E | 7.55:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #28558E | 2.78:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #28558E text on white | 7.55:1 | AAA | Lc 86.0 | Fine for body text |
| #28558E text on black | 2.78:1 | Fails | Lc -16.1 | 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 800.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBF0
oklch(88.6% 0.034 255.2)
-
Step 300
300
#A6C3E9
oklch(80.9% 0.063 255.3)
-
Step 400
400
#76A3DE
oklch(70.7% 0.1 255.5)
-
Step 500
500
#528BD5
oklch(63.1% 0.127 255.6)
-
Step 600
600
#3574C2
oklch(55.7% 0.138 255.3)
-
Step 700
700
#2761A7
oklch(49.2% 0.127 255.1)
-
Step 800
800 (this color)
#28558E
oklch(44.8% 0.106 255.5)
-
Step 900
900
#21426D
oklch(37.7% 0.084 255.9)
-
Step 950
950
#142740
oklch(27% 0.053 255.8)
#28558E 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) | #3B5990 | 0.025 |
| Deuteranopia (no green cones) | #2B508D | 0.014 |
| Tritanopia (no blue cones) | #00626A | 0.083 |
| Achromatopsia (no color) | #545454 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28558E
#28558E
oklch(44.8% 0.106 255.5)
- #724C00
#724C00
oklch(44.8% 0.094 75.9)
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 #28558E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.006
- Light Navy Blue #2E5A88 ΔE 0.021
- Light Navy #155084 ΔE 0.027
- Denim Blue #3B5B92 ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.031
- Cobalt #1E488F ΔE 0.040
- Twilight #4E518B ΔE 0.045
- Dusk #4E5481 ΔE 0.048
Use #28558E 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.