#02489B
Closest named color: Cobalt (#1E488F). oklch(41.7% 0.149 257.5), rgb(2, 72, 155).
Aa
White text reads best on this color (8.73:1).
About this color
#02489B is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.149 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 8.73:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.40:1 |
| White text | 8.73:1 |
Values
| HEX | #02489B |
| RGB | rgb(2, 72, 155) |
| HSL | hsl(213, 97%, 31%) |
| OKLCH | oklch(41.7% 0.149 257.5) |
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 #02489B | 8.73:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #02489B | 2.40:1 | Fails | Lc 14.8 | Not readable |
| #02489B text on white | 8.73:1 | AAA | Lc 89.2 | Fine for body text |
| #02489B text on black | 2.40:1 | Fails | Lc -13.0 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9DC3F9
oklch(80.9% 0.087 257.2)
-
Step 400
400
#66A1F6
oklch(70.6% 0.14 257.6)
-
Step 500
500
#3A87F2
oklch(63.1% 0.178 257.5)
-
Step 600
600
#0E6EE1
oklch(55.6% 0.193 257.4)
-
Step 700
700
#005BC2
oklch(49% 0.177 257.5)
-
Step 800
800 (this color)
#02489B
oklch(41.7% 0.149 257.5)
-
Step 900
900
#11407E
oklch(37.8% 0.116 257.2)
-
Step 950
950
#0C264A
oklch(27.1% 0.074 257.4)
#02489B 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) | #04529E | 0.028 |
| Deuteranopia (no green cones) | #004599 | 0.009 |
| Tritanopia (no blue cones) | #005D6A | 0.113 |
| Achromatopsia (no color) | #4B4B4B | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #02489B
#02489B
oklch(41.7% 0.149 257.5)
- #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 #02489B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Sapphire #2138AB ΔE 0.047
- Light Navy #155084 ΔE 0.048
- Dusk Blue #26538D ΔE 0.048
- Twilight Blue #0A437A ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.058
- Blueberry #464196 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.072
Use #02489B 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.