#00479B
Closest named color: Cobalt (#1E488F). oklch(41.5% 0.151 257.6), rgb(0, 71, 155).
Aa
White text reads best on this color (8.84:1).
About this color
#00479B is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.151 and its hue 258°. 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 8.84:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.37:1 |
| White text | 8.84:1 |
Values
| HEX | #00479B |
| RGB | rgb(0, 71, 155) |
| HSL | hsl(213, 100%, 30%) |
| OKLCH | oklch(41.5% 0.151 257.6) |
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 #00479B | 8.84:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #00479B | 2.37:1 | Fails | Lc 14.5 | Not readable |
| #00479B text on white | 8.84:1 | AAA | Lc 89.5 | Fine for body text |
| #00479B text on black | 2.37:1 | Fails | Lc -12.8 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9DC3FA
oklch(81% 0.088 257.6)
-
Step 400
400
#66A1F7
oklch(70.6% 0.141 257.8)
-
Step 500
500
#3987F4
oklch(63.2% 0.18 257.6)
-
Step 600
600
#0C6DE2
oklch(55.5% 0.196 257.6)
-
Step 700
700
#005BC3
oklch(49.1% 0.179 257.6)
-
Step 800
800 (this color)
#00479B
oklch(41.5% 0.151 257.6)
-
Step 900
900
#113F7E
oklch(37.6% 0.118 257.7)
-
Step 950
950
#0C264A
oklch(27.1% 0.074 257.4)
#00479B 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) | #00519E | 0.028 |
| Deuteranopia (no green cones) | #004499 | 0.009 |
| Tritanopia (no blue cones) | #005C6A | 0.113 |
| Achromatopsia (no color) | #4A4A4A | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00479B
#00479B
oklch(41.5% 0.151 257.6)
- #654400
#654400
oklch(41.3% 0.086 77.3)
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 #00479B, 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
- Light Navy #155084 ΔE 0.050
- Dusk Blue #26538D ΔE 0.051
- Twilight Blue #0A437A ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.060
- Blueberry #464196 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.072
Use #00479B 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.