#00008B
Named color: Dark Blue. oklch(28.8% 0.199 264.1), rgb(0, 0, 139).
Aa
White text reads best on this color (15.29:1).
About this color
#00008B is a dark, vivid blue. In OKLCH its lightness is 29%, its chroma 0.199 and its hue 264°. Its hue sits on the cool side of the wheel. It is the named color Dark Blue. White text reads best on it, at 15.29:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Dark Blue |
| Black text | 1.37:1 |
| White text | 15.29:1 |
Values
| HEX | #00008B |
| RGB | rgb(0, 0, 139) |
| HSL | hsl(240, 100%, 27%) |
| OKLCH | oklch(28.8% 0.199 264.1) |
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 #00008B | 15.29:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #00008B | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #00008B text on white | 15.29:1 | AAA | Lc 100.0 | Preferred for body text |
| #00008B text on black | 1.37:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4A80FF
oklch(63.1% 0.198 264.2)
-
Step 600
600
#235FFF
oklch(55.6% 0.245 264.1)
-
Step 700
700
#0038FF
oklch(49.1% 0.287 264)
-
Step 800
800
#002CD5
oklch(42.7% 0.252 264.1)
-
Step 900
900
#0024B4
oklch(37.7% 0.222 264)
-
Step 950
950 (this color)
#00008B
oklch(28.8% 0.199 264.1)
#00008B 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) | #002C8E | 0.067 |
| Deuteranopia (no green cones) | #001D89 | 0.035 |
| Tritanopia (no blue cones) | #00374F | 0.148 |
| Achromatopsia (no color) | #252525 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00008B
#00008B
oklch(28.8% 0.199 264.1)
- #382800
#382800
oklch(28.8% 0.059 85.3)
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 #00008B, closest first.
No curated palette has a color within ΔE 0.04 of #00008B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy #000080 ΔE 0.020
- Royal #0C1793 ΔE 0.036
- Deep Blue #040273 ΔE 0.044
- Dark Royal Blue #02066F ΔE 0.050
- Cobalt Blue #030AA7 ΔE 0.054
- Midnight Blue #191970 ΔE 0.061
- Darkblue #030764 ΔE 0.070
- Ultramarine #2000B1 ΔE 0.078
Use #00008B 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.