#00426B
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.091 244.7), rgb(0, 66, 107).
Aa
White text reads best on this color (10.54:1).
About this color
#00426B is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.091 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.027 away. White text reads best on it, at 10.54:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.99:1 |
| White text | 10.54:1 |
Values
| HEX | #00426B |
| RGB | rgb(0, 66, 107) |
| HSL | hsl(203, 100%, 21%) |
| OKLCH | oklch(36.6% 0.091 244.7) |
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 #00426B | 10.54:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #00426B | 1.99:1 | Fails | Lc 10.0 | Not readable |
| #00426B text on white | 10.54:1 | AAA | Lc 93.9 | Preferred for body text |
| #00426B text on black | 1.99:1 | Fails | Lc -8.6 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF1
oklch(88.4% 0.038 245.8)
-
Step 300
300
#9CC6EA
oklch(80.9% 0.068 244.6)
-
Step 400
400
#61A8E0
oklch(70.8% 0.109 244)
-
Step 500
500
#2B90D8
oklch(63.1% 0.141 244.9)
-
Step 600
600
#0079BE
oklch(55.6% 0.139 244.6)
-
Step 700
700
#0066A1
oklch(49.2% 0.123 244.5)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900 (this color)
#00426B
oklch(36.6% 0.091 244.7)
-
Step 950
950
#082941
oklch(27.1% 0.058 244.7)
#00426B 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) | #2E446D | 0.038 |
| Deuteranopia (no green cones) | #1F3B6A | 0.026 |
| Tritanopia (no blue cones) | #004C51 | 0.063 |
| Achromatopsia (no color) | #3F3F3F | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00426B
#00426B
oklch(36.6% 0.091 244.7)
- #5C3400
#5C3400
oklch(36.7% 0.082 64.8)
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 #00426B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.027
- Marine Blue #01386A ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.048
- Charcoal #264653 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.053
- Midnight Green #073B4C ΔE 0.055
- Light Navy #155084 ΔE 0.059
Use #00426B 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.