#24499B
Closest named color: Cobalt (#1E488F). oklch(42.8% 0.141 263.4), rgb(36, 73, 155).
Aa
White text reads best on this color (8.39:1).
About this color
#24499B is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.141 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 8.39:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.50:1 |
| White text | 8.39:1 |
Values
| HEX | #24499B |
| RGB | rgb(36, 73, 155) |
| HSL | hsl(221, 62%, 37%) |
| OKLCH | oklch(42.8% 0.141 263.4) |
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 #24499B | 8.39:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #24499B | 2.50:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #24499B text on white | 8.39:1 | AAA | Lc 88.5 | Fine for body text |
| #24499B text on black | 2.50:1 | Fails | Lc -13.7 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF8
oklch(88.6% 0.045 263.1)
-
Step 300
300
#A5C1F7
oklch(80.9% 0.083 263.3)
-
Step 400
400
#759FF3
oklch(70.8% 0.132 263.2)
-
Step 500
500
#5284EE
oklch(63.1% 0.168 263.4)
-
Step 600
600
#376BDC
oklch(55.6% 0.182 263.2)
-
Step 700
700
#2A58BF
oklch(49% 0.17 263.3)
-
Step 800
800 (this color)
#24499B
oklch(42.8% 0.141 263.4)
-
Step 900
900
#213E7B
oklch(37.7% 0.11 263.1)
-
Step 950
950
#142548
oklch(27.1% 0.069 263.1)
#24499B 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) | #11539E | 0.027 |
| Deuteranopia (no green cones) | #004899 | 0.021 |
| Tritanopia (no blue cones) | #005D6B | 0.111 |
| Achromatopsia (no color) | #4D4D4D | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #24499B
#24499B
oklch(42.8% 0.141 263.4)
- #664A00
#664A00
oklch(42.8% 0.088 83.6)
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 #24499B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Dusk Blue #26538D ΔE 0.039
- Blueberry #464196 ΔE 0.044
- Light Navy #155084 ΔE 0.047
- Sapphire #2138AB ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.061
Use #24499B 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.