#09478E
Closest named color: Cobalt (#1E488F). oklch(40.6% 0.132 256.2), rgb(9, 71, 142).
Aa
White text reads best on this color (9.11:1).
About this color
#09478E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.132 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.013 away. White text reads best on it, at 9.11:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #09478E |
| RGB | rgb(9, 71, 142) |
| HSL | hsl(212, 88%, 30%) |
| OKLCH | oklch(40.6% 0.132 256.2) |
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 #09478E | 9.11:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #09478E | 2.30:1 | Fails | Lc 13.6 | Not readable |
| #09478E text on white | 9.11:1 | AAA | Lc 90.4 | Preferred for body text |
| #09478E text on black | 2.30:1 | Fails | Lc -11.9 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F2
oklch(80.8% 0.077 255.9)
-
Step 400
400
#6CA3EC
oklch(70.8% 0.122 255.9)
-
Step 500
500
#4289E6
oklch(63% 0.157 256.2)
-
Step 600
600
#1F71D4
oklch(55.6% 0.17 256.1)
-
Step 700
700
#105EB8
oklch(49.1% 0.159 256.2)
-
Step 800
800 (this color)
#09478E
oklch(40.6% 0.132 256.2)
-
Step 900
900
#174177
oklch(37.7% 0.103 256.3)
-
Step 950
950
#0F2645
oklch(26.9% 0.065 256.6)
#09478E 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) | #1C4E91 | 0.025 |
| Deuteranopia (no green cones) | #00438D | 0.013 |
| Tritanopia (no blue cones) | #005863 | 0.099 |
| Achromatopsia (no color) | #484848 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09478E
#09478E
oklch(40.6% 0.132 256.2)
- #634200
#634200
oklch(40.6% 0.085 76.6)
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 #09478E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.013
- Twilight Blue #0A437A ΔE 0.034
- Light Navy #155084 ΔE 0.034
- Dusk Blue #26538D ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.046
- Sapphire #2138AB ΔE 0.061
- Blueberry #464196 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.067
Use #09478E 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.