#28459C
Closest named color: Cobalt (#1E488F). oklch(42.2% 0.146 266.2), rgb(40, 69, 156).
Aa
White text reads best on this color (8.67:1).
About this color
#28459C is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.146 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.025 away. White text reads best on it, at 8.67:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.42:1 |
| White text | 8.67:1 |
Values
| HEX | #28459C |
| RGB | rgb(40, 69, 156) |
| HSL | hsl(225, 59%, 38%) |
| OKLCH | oklch(42.2% 0.146 266.2) |
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 #28459C | 8.67:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #28459C | 2.42:1 | Fails | Lc 14.7 | Not readable |
| #28459C text on white | 8.67:1 | AAA | Lc 89.3 | Fine for body text |
| #28459C text on black | 2.42:1 | Fails | Lc -12.9 | Not readable |
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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A7C0F9
oklch(80.9% 0.086 266.1)
-
Step 400
400
#799DF6
oklch(70.8% 0.137 266.3)
-
Step 500
500
#5881F2
oklch(63% 0.175 266.4)
-
Step 600
600
#3F68E1
oklch(55.7% 0.19 266.2)
-
Step 700
700
#3255C3
oklch(49% 0.177 266.4)
-
Step 800
800 (this color)
#28459C
oklch(42.2% 0.146 266.2)
-
Step 900
900
#253C7D
oklch(37.6% 0.114 266.3)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#28459C 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) | #00519F | 0.035 |
| Deuteranopia (no green cones) | #00469A | 0.025 |
| Tritanopia (no blue cones) | #005A69 | 0.117 |
| Achromatopsia (no color) | #4B4B4B | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28459C
#28459C
oklch(42.2% 0.146 266.2)
- #624900
#624900
oklch(42.1% 0.086 86)
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 #28459C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.025
- Blueberry #464196 ΔE 0.040
- Sapphire #2138AB ΔE 0.041
- Dusk Blue #26538D ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.052
- Light Navy #155084 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.063
- Deep Sea Blue #015482 ΔE 0.067
Use #28459C 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.