#00426D
Closest named color: Twilight Blue (#0A437A). oklch(36.7% 0.094 245.8), rgb(0, 66, 109).
Aa
White text reads best on this color (10.49:1).
About this color
#00426D is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.094 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.023 away. White text reads best on it, at 10.49:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.00:1 |
| White text | 10.49:1 |
Values
| HEX | #00426D |
| RGB | rgb(0, 66, 109) |
| HSL | hsl(204, 100%, 21%) |
| OKLCH | oklch(36.7% 0.094 245.8) |
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 #00426D | 10.49:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #00426D | 2.00:1 | Fails | Lc 10.1 | Not readable |
| #00426D text on white | 10.49:1 | AAA | Lc 93.8 | Preferred for body text |
| #00426D text on black | 2.00:1 | Fails | Lc -8.7 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9BC6EC
oklch(80.9% 0.071 245.5)
-
Step 400
400
#61A7E3
oklch(70.7% 0.113 246.2)
-
Step 500
500
#2A90DB
oklch(63.2% 0.144 245.8)
-
Step 600
600
#0078C1
oklch(55.5% 0.143 246.2)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900 (this color)
#00426D
oklch(36.7% 0.094 245.8)
-
Step 950
950
#082942
oklch(27.2% 0.06 245.7)
#00426D 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) | #2D446F | 0.036 |
| Deuteranopia (no green cones) | #1D3B6C | 0.025 |
| Tritanopia (no blue cones) | #004D52 | 0.067 |
| Achromatopsia (no color) | #3F3F3F | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00426D
#00426D
oklch(36.7% 0.094 245.8)
- #5C3500
#5C3500
oklch(36.9% 0.082 66.1)
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 #00426D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.023
- Marine Blue #01386A ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.050
- Charcoal #264653 ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.056
- Light Navy #155084 ΔE 0.057
- Midnight Green #073B4C ΔE 0.058
Use #00426D 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.