#28498D
Closest named color: Cobalt (#1E488F). oklch(41.9% 0.119 262.8), rgb(40, 73, 141).
Aa
White text reads best on this color (8.64:1).
About this color
#28498D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.119 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.010 away. White text reads best on it, at 8.64:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.42:1 |
| White text | 8.64:1 |
Values
| HEX | #28498D |
| RGB | rgb(40, 73, 141) |
| HSL | hsl(220, 56%, 35%) |
| OKLCH | oklch(41.9% 0.119 262.8) |
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 #28498D | 8.64:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #28498D | 2.42:1 | Fails | Lc 14.6 | Not readable |
| #28498D text on white | 8.64:1 | AAA | Lc 89.4 | Fine for body text |
| #28498D 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF4
oklch(88.6% 0.039 262.9)
-
Step 300
300
#A9C1EF
oklch(80.9% 0.07 263.3)
-
Step 400
400
#7BA0E6
oklch(70.7% 0.111 262.5)
-
Step 500
500
#5A86DF
oklch(63% 0.143 263.1)
-
Step 600
600
#406ECD
oklch(55.5% 0.156 262.9)
-
Step 700
700
#325CB1
oklch(49.1% 0.143 262.6)
-
Step 800
800 (this color)
#28498D
oklch(41.9% 0.119 262.8)
-
Step 900
900
#263F73
oklch(37.6% 0.094 263.2)
-
Step 950
950
#172543
oklch(26.9% 0.059 264)
#28498D 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) | #255090 | 0.020 |
| Deuteranopia (no green cones) | #0E478C | 0.021 |
| Tritanopia (no blue cones) | #005964 | 0.096 |
| Achromatopsia (no color) | #4C4C4C | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28498D
#28498D
oklch(41.9% 0.119 262.8)
- #634700
#634700
oklch(41.7% 0.086 82.7)
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 #28498D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.010
- Dusk Blue #26538D ΔE 0.029
- Light Navy #155084 ΔE 0.030
- Deep Sea Blue #015482 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.044
- Blueberry #464196 ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.054
Use #28498D 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.