#24579C
Closest named color: Dusk Blue (#26538D). oklch(46% 0.125 257), rgb(36, 87, 156).
Aa
White text reads best on this color (7.19:1).
About this color
#24579C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.125 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.025 away. White text reads best on it, at 7.19:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.91:1 |
| White text | 7.19:1 |
Values
| HEX | #24579C |
| RGB | rgb(36, 87, 156) |
| HSL | hsl(215, 63%, 38%) |
| OKLCH | oklch(46% 0.125 257) |
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 #24579C | 7.19:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #24579C | 2.91:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #24579C text on white | 7.19:1 | AAA | Lc 84.6 | Fine for body text |
| #24579C text on black | 2.91:1 | Fails | Lc -17.4 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CBDAF0
oklch(88.4% 0.034 257.9)
-
Step 300
300
#A8C3E8
oklch(81% 0.06 256.3)
-
Step 400
400
#79A3DD
oklch(70.8% 0.097 256.6)
-
Step 500
500
#578AD3
oklch(63% 0.124 257.4)
-
Step 600
600
#3B73C0
oklch(55.6% 0.134 256.9)
-
Step 700
700 (this color)
#24579C
oklch(46% 0.125 257)
-
Step 800
800
#264F86
oklch(42.7% 0.103 256.5)
-
Step 900
900
#24426C
oklch(37.8% 0.081 257.1)
-
Step 950
950
#15273F
oklch(27% 0.051 256.1)
#24579C 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) | #345D9F | 0.025 |
| Deuteranopia (no green cones) | #1E529B | 0.016 |
| Tritanopia (no blue cones) | #006772 | 0.095 |
| Achromatopsia (no color) | #575757 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #24579C
#24579C
oklch(46% 0.125 257)
- #765000
#765000
oklch(46.1% 0.096 77.2)
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 #24579C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.036
- Light Navy #155084 ΔE 0.045
- Cobalt #1E488F ΔE 0.047
- Dusky Blue #475F94 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.048
- Peacock Blue #016795 ΔE 0.050
Use #24579C 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.