#0A489F
Closest named color: Cobalt (#1E488F). oklch(42.2% 0.153 259), rgb(10, 72, 159).
Aa
White text reads best on this color (8.60:1).
About this color
#0A489F is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.153 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 8.60:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.44:1 |
| White text | 8.60:1 |
Values
| HEX | #0A489F |
| RGB | rgb(10, 72, 159) |
| HSL | hsl(215, 88%, 33%) |
| OKLCH | oklch(42.2% 0.153 259) |
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 #0A489F | 8.60:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #0A489F | 2.44:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #0A489F text on white | 8.60:1 | AAA | Lc 88.9 | Fine for body text |
| #0A489F text on black | 2.44:1 | Fails | Lc -13.3 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9EC2FB
oklch(80.9% 0.09 259.4)
-
Step 400
400
#68A0F9
oklch(70.6% 0.144 259.3)
-
Step 500
500
#3D86F6
oklch(63.2% 0.183 258.9)
-
Step 600
600
#176CE5
oklch(55.6% 0.199 259)
-
Step 700
700
#0759C7
oklch(49.1% 0.186 259.1)
-
Step 800
800 (this color)
#0A489F
oklch(42.2% 0.153 259)
-
Step 900
900
#143F80
oklch(37.8% 0.12 259)
-
Step 950
950
#0D254B
oklch(27% 0.077 259.3)
#0A489F 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) | #0053A2 | 0.029 |
| Deuteranopia (no green cones) | #00469D | 0.008 |
| Tritanopia (no blue cones) | #005E6C | 0.117 |
| Achromatopsia (no color) | #4C4C4C | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A489F
#0A489F
oklch(42.2% 0.153 259)
- #674700
#674700
oklch(42.3% 0.088 79.2)
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 #0A489F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Sapphire #2138AB ΔE 0.043
- Dusk Blue #26538D ΔE 0.050
- Light Navy #155084 ΔE 0.053
- Blueberry #464196 ΔE 0.060
- Twilight Blue #0A437A ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.063
- Blue Blue #2242C7 ΔE 0.067
Use #0A489F 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.