#02489C
Closest named color: Cobalt (#1E488F). oklch(41.8% 0.15 257.6), rgb(2, 72, 156).
Aa
White text reads best on this color (8.71:1).
About this color
#02489C is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.150 and its hue 258°. 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 8.71:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.40:1 |
| White text | 8.71:1 |
Values
| HEX | #02489C |
| RGB | rgb(2, 72, 156) |
| HSL | hsl(213, 97%, 31%) |
| OKLCH | oklch(41.8% 0.15 257.6) |
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 #02489C | 8.71:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #02489C | 2.40:1 | Fails | Lc 14.9 | Not readable |
| #02489C text on white | 8.71:1 | AAA | Lc 89.1 | Fine for body text |
| #02489C text on black | 2.40:1 | Fails | Lc -13.1 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9DC3FA
oklch(81% 0.088 257.6)
-
Step 400
400
#66A1F7
oklch(70.6% 0.141 257.8)
-
Step 500
500
#3987F3
oklch(63.1% 0.179 257.5)
-
Step 600
600
#0E6DE2
oklch(55.5% 0.196 257.7)
-
Step 700
700
#005BC3
oklch(49.1% 0.179 257.6)
-
Step 800
800 (this color)
#02489C
oklch(41.8% 0.15 257.6)
-
Step 900
900
#113F7E
oklch(37.6% 0.118 257.7)
-
Step 950
950
#0C264A
oklch(27.1% 0.074 257.4)
#02489C 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) | #01529F | 0.028 |
| Deuteranopia (no green cones) | #00459A | 0.009 |
| Tritanopia (no blue cones) | #005D6B | 0.113 |
| Achromatopsia (no color) | #4B4B4B | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #02489C
#02489C
oklch(41.8% 0.15 257.6)
- #664500
#664500
oklch(41.7% 0.087 77.7)
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 #02489C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.025
- Sapphire #2138AB ΔE 0.046
- Dusk Blue #26538D ΔE 0.049
- Light Navy #155084 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.059
- Blueberry #464196 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.072
Use #02489C 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.