#0A487F
Closest named color: Twilight Blue (#0A437A). oklch(39.7% 0.109 251.3), rgb(10, 72, 127).
Aa
White text reads best on this color (9.34:1).
About this color
#0A487F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.109 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.016 away. White text reads best on it, at 9.34:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #0A487F |
| RGB | rgb(10, 72, 127) |
| HSL | hsl(208, 85%, 27%) |
| OKLCH | oklch(39.7% 0.109 251.3) |
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 #0A487F | 9.34:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #0A487F | 2.24:1 | Fails | Lc 12.9 | Not readable |
| #0A487F text on white | 9.34:1 | AAA | Lc 91.1 | Preferred for body text |
| #0A487F text on black | 2.24:1 | Fails | Lc -11.2 | 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 900.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C4DCF7
oklch(88.5% 0.045 251.4)
-
Step 300
300
#9AC5F5
oklch(81% 0.082 251.6)
-
Step 400
400
#5EA5EF
oklch(70.7% 0.131 251)
-
Step 500
500
#268CEA
oklch(63.1% 0.167 251.2)
-
Step 600
600
#0075CE
oklch(55.7% 0.162 251.1)
-
Step 700
700
#0062AF
oklch(49.2% 0.144 251.3)
-
Step 800
800
#005090
oklch(42.7% 0.125 251.1)
-
Step 900
900 (this color)
#0A487F
oklch(39.7% 0.109 251.3)
-
Step 950
950
#072747
oklch(26.9% 0.07 252)
#0A487F 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) | #2C4C81 | 0.030 |
| Deuteranopia (no green cones) | #17427E | 0.017 |
| Tritanopia (no blue cones) | #00555D | 0.079 |
| Achromatopsia (no color) | #474747 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A487F
#0A487F
oklch(39.7% 0.109 251.3)
- #633E00
#633E00
oklch(39.8% 0.085 71.7)
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 #0A487F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.016
- Light Navy #155084 ΔE 0.026
- Cobalt #1E488F ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.036
- Dusk Blue #26538D ΔE 0.045
- Marine Blue #01386A ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.063
- Light Navy Blue #2E5A88 ΔE 0.065
Use #0A487F 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.