#0B489D
Closest named color: Cobalt (#1E488F). oklch(42% 0.151 258.8), rgb(11, 72, 157).
Aa
White text reads best on this color (8.64:1).
About this color
#0B489D is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.151 and its hue 259°. 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 8.64:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.42:1 |
| White text | 8.64:1 |
Values
| HEX | #0B489D |
| RGB | rgb(11, 72, 157) |
| HSL | hsl(215, 87%, 33%) |
| OKLCH | oklch(42% 0.151 258.8) |
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 #0B489D | 8.64:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #0B489D | 2.42:1 | Fails | Lc 15.0 | Not readable |
| #0B489D text on white | 8.64:1 | AAA | Lc 89.0 | Fine for body text |
| #0B489D text on black | 2.42:1 | Fails | Lc -13.2 | 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
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9EC2FA
oklch(80.8% 0.089 259.1)
-
Step 400
400
#69A1F7
oklch(70.8% 0.14 258.7)
-
Step 500
500
#3E86F4
oklch(63.1% 0.18 258.8)
-
Step 600
600
#196DE3
oklch(55.7% 0.195 258.7)
-
Step 700
700
#095AC5
oklch(49.2% 0.182 258.7)
-
Step 800
800 (this color)
#0B489D
oklch(42% 0.151 258.8)
-
Step 900
900
#153F7E
oklch(37.7% 0.117 258.8)
-
Step 950
950
#0D254A
oklch(26.9% 0.075 258.9)
#0B489D 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) | #0052A0 | 0.027 |
| Deuteranopia (no green cones) | #00469B | 0.008 |
| Tritanopia (no blue cones) | #005D6B | 0.114 |
| Achromatopsia (no color) | #4C4C4C | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B489D
#0B489D
oklch(42% 0.151 258.8)
- #664600
#664600
oklch(41.9% 0.087 78.9)
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 #0B489D, 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 0.045
- Dusk Blue #26538D ΔE 0.048
- Light Navy #155084 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.059
- Blueberry #464196 ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.070
Use #0B489D 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.