#00417E
Closest named color: Twilight Blue (#0A437A). oklch(37.7% 0.118 253.6), rgb(0, 65, 126).
Aa
White text reads best on this color (10.20:1).
About this color
#00417E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.118 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.011 away. White text reads best on it, at 10.20:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.20:1 |
Values
| HEX | #00417E |
| RGB | rgb(0, 65, 126) |
| HSL | hsl(209, 100%, 25%) |
| OKLCH | oklch(37.7% 0.118 253.6) |
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 #00417E | 10.20:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #00417E | 2.05:1 | Fails | Lc 10.9 | Not readable |
| #00417E text on white | 10.20:1 | AAA | Lc 93.1 | Preferred for body text |
| #00417E text on black | 2.05:1 | Fails | Lc -9.4 | 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
#98C4F9
oklch(80.8% 0.089 253.5)
-
Step 400
400
#5CA3F7
oklch(70.6% 0.143 253.9)
-
Step 500
500
#228AF3
oklch(63.2% 0.181 253.4)
-
Step 600
600
#0072D5
oklch(55.5% 0.175 253.6)
-
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)
#00417E
oklch(37.7% 0.118 253.6)
-
Step 950
950
#06274A
oklch(27.1% 0.075 253.4)
#00417E 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) | #1E4780 | 0.027 |
| Deuteranopia (no green cones) | #003C7D | 0.015 |
| Tritanopia (no blue cones) | #005059 | 0.088 |
| Achromatopsia (no color) | #414141 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00417E
#00417E
oklch(37.7% 0.118 253.6)
- #5B3A00
#5B3A00
oklch(37.8% 0.08 73.5)
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 #00417E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.011
- Cobalt #1E488F ΔE 0.040
- Marine Blue #01386A ΔE 0.041
- Light Navy #155084 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.057
- Dusk Blue #26538D ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.071
Use #00417E 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.