#024589
Closest named color: Cobalt (#1E488F). oklch(39.6% 0.128 254.9), rgb(2, 69, 137).
Aa
White text reads best on this color (9.48:1).
About this color
#024589 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.128 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.022 away. White text reads best on it, at 9.48:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #024589 |
| RGB | rgb(2, 69, 137) |
| HSL | hsl(210, 97%, 27%) |
| OKLCH | oklch(39.6% 0.128 254.9) |
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 #024589 | 9.48:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #024589 | 2.21:1 | Fails | Lc 12.7 | Not readable |
| #024589 text on white | 9.48:1 | AAA | Lc 91.3 | Preferred for body text |
| #024589 text on black | 2.21:1 | Fails | Lc -11.1 | 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 900.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C2DCFD
oklch(88.6% 0.054 254.5)
-
Step 300
300
#96C4FE
oklch(80.9% 0.096 254.6)
-
Step 400
400
#58A2FE
oklch(70.6% 0.154 255)
-
Step 500
500
#1987FC
oklch(63% 0.197 255)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005FB9
oklch(49.2% 0.161 254.8)
-
Step 800
800
#004D99
oklch(42.7% 0.14 255)
-
Step 900
900 (this color)
#024589
oklch(39.6% 0.128 254.9)
-
Step 950
950
#04264D
oklch(27% 0.082 254.9)
#024589 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) | #1C4C8C | 0.027 |
| Deuteranopia (no green cones) | #004088 | 0.014 |
| Tritanopia (no blue cones) | #005660 | 0.097 |
| Achromatopsia (no color) | #464646 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #024589
#024589
oklch(39.6% 0.128 254.9)
- #603F00
#603F00
oklch(39.6% 0.083 75.5)
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 #024589, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.022
- Twilight Blue #0A437A ΔE 0.025
- Light Navy #155084 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.048
- Dusk Blue #26538D ΔE 0.050
- Marine Blue #01386A ΔE 0.063
- Sapphire #2138AB ΔE 0.067
- Blueberry #464196 ΔE 0.069
Use #024589 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.