#09478D
Closest named color: Cobalt (#1E488F). oklch(40.5% 0.13 255.9), rgb(9, 71, 141).
Aa
White text reads best on this color (9.14:1).
About this color
#09478D is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.130 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.014 away. White text reads best on it, at 9.14:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.29:1 |
| White text | 9.14:1 |
Values
| HEX | #09478D |
| RGB | rgb(9, 71, 141) |
| HSL | hsl(212, 88%, 29%) |
| OKLCH | oklch(40.5% 0.13 255.9) |
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 #09478D | 9.14:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #09478D | 2.29:1 | Fails | Lc 13.5 | Not readable |
| #09478D text on white | 9.14:1 | AAA | Lc 90.5 | Preferred for body text |
| #09478D text on black | 2.29:1 | Fails | Lc -11.8 | 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
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A1C3F2
oklch(80.9% 0.076 256.6)
-
Step 400
400
#6CA3EB
oklch(70.7% 0.121 255.6)
-
Step 500
500
#438AE5
oklch(63.2% 0.155 255.8)
-
Step 600
600
#1F71D3
oklch(55.5% 0.169 256)
-
Step 700
700
#105EB7
oklch(49% 0.158 256)
-
Step 800
800 (this color)
#09478D
oklch(40.5% 0.13 255.9)
-
Step 900
900
#174176
oklch(37.7% 0.102 256)
-
Step 950
950
#0F2745
oklch(27.1% 0.064 255.3)
#09478D 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) | #1D4E90 | 0.025 |
| Deuteranopia (no green cones) | #00438C | 0.013 |
| Tritanopia (no blue cones) | #005863 | 0.097 |
| Achromatopsia (no color) | #484848 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09478D
#09478D
oklch(40.5% 0.13 255.9)
- #634100
#634100
oklch(40.4% 0.085 75.4)
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 #09478D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.014
- Twilight Blue #0A437A ΔE 0.033
- Light Navy #155084 ΔE 0.034
- Dusk Blue #26538D ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.045
- Sapphire #2138AB ΔE 0.063
- Blueberry #464196 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.067
Use #09478D 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.