#004280
Closest named color: Twilight Blue (#0A437A). oklch(38.1% 0.12 253.7), rgb(0, 66, 128).
Aa
White text reads best on this color (10.04:1).
About this color
#004280 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.120 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.012 away. White text reads best on it, at 10.04:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.09:1 |
| White text | 10.04:1 |
Values
| HEX | #004280 |
| RGB | rgb(0, 66, 128) |
| HSL | hsl(209, 100%, 25%) |
| OKLCH | oklch(38.1% 0.12 253.7) |
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 #004280 | 10.04:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #004280 | 2.09:1 | Fails | Lc 11.3 | Not readable |
| #004280 text on white | 10.04:1 | AAA | Lc 92.7 | Preferred for body text |
| #004280 text on black | 2.09:1 | Fails | Lc -9.8 | 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 900.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFB
oklch(93.5% 0.026 253.6)
-
Step 200
200
#C3DCFA
oklch(88.6% 0.049 253.1)
-
Step 300
300
#98C4FA
oklch(80.9% 0.09 253.9)
-
Step 400
400
#5BA3F8
oklch(70.6% 0.145 253.9)
-
Step 500
500
#2089F4
oklch(63% 0.184 253.7)
-
Step 600
600
#0072D6
oklch(55.6% 0.176 253.8)
-
Step 700
700
#0060B5
oklch(49.2% 0.155 253.6)
-
Step 800
800
#004E96
oklch(42.7% 0.135 253.8)
-
Step 900
900 (this color)
#004280
oklch(38.1% 0.12 253.7)
-
Step 950
950
#05274A
oklch(27.1% 0.075 252.9)
#004280 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) | #1E4882 | 0.027 |
| Deuteranopia (no green cones) | #003D7F | 0.015 |
| Tritanopia (no blue cones) | #00515A | 0.089 |
| Achromatopsia (no color) | #424242 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004280
#004280
oklch(38.1% 0.12 253.7)
- #5C3B00
#5C3B00
oklch(38.2% 0.081 73.9)
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 #004280, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.012
- Cobalt #1E488F ΔE 0.036
- Light Navy #155084 ΔE 0.045
- Marine Blue #01386A ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.054
- Dusk Blue #26538D ΔE 0.062
- Dark Grey Blue #29465B ΔE 0.072
- Prussian Blue #1D3557 ΔE 0.075
Use #004280 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.