#004263
Closest named color: Marine Blue (#01386A). oklch(36.1% 0.081 239.1), rgb(0, 66, 99).
Aa
White text reads best on this color (10.71:1).
About this color
#004263 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.081 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.036 away. White text reads best on it, at 10.71:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.95:1 |
| White text | 10.71:1 |
Values
| HEX | #004263 |
| RGB | rgb(0, 66, 99) |
| HSL | hsl(200, 100%, 19%) |
| OKLCH | oklch(36.1% 0.081 239.1) |
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 #004263 | 10.71:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #004263 | 1.95:1 | Fails | Lc 9.6 | Not readable |
| #004263 text on white | 10.71:1 | AAA | Lc 94.3 | Preferred for body text |
| #004263 text on black | 1.95:1 | Fails | Lc -8.2 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DDEE
oklch(88.6% 0.034 239.9)
-
Step 300
300
#9DC7E4
oklch(80.9% 0.061 238.6)
-
Step 400
400
#63A9D7
oklch(70.7% 0.098 239)
-
Step 500
500
#2E92CC
oklch(63% 0.125 239.3)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900 (this color)
#004263
oklch(36.1% 0.081 239.1)
-
Step 950
950
#09293D
oklch(26.9% 0.052 240.5)
#004263 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) | #324264 | 0.042 |
| Deuteranopia (no green cones) | #253A62 | 0.033 |
| Tritanopia (no blue cones) | #004A4E | 0.051 |
| Achromatopsia (no color) | #3E3E3E | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004263
#004263
oklch(36.1% 0.081 239.1)
- #5C3105
#5C3105
oklch(36.1% 0.082 59.1)
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 #004263, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.037
- Twilight Blue #0A437A ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.041
- Midnight Green #073B4C ΔE 0.042
- Charcoal #264653 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.043
- Dark Teal #014D4E ΔE 0.059
Use #004263 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.