#424988
Closest named color: Twilight (#4E518B). oklch(43.1% 0.103 276.4), rgb(66, 73, 136).
Aa
White text reads best on this color (8.26:1).
About this color
#424988 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.103 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.031 away. White text reads best on it, at 8.26:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.54:1 |
| White text | 8.26:1 |
Values
| HEX | #424988 |
| RGB | rgb(66, 73, 136) |
| HSL | hsl(234, 35%, 40%) |
| OKLCH | oklch(43.1% 0.103 276.4) |
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 #424988 | 8.26:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #424988 | 2.54:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #424988 text on white | 8.26:1 | AAA | Lc 88.4 | Fine for body text |
| #424988 text on black | 2.54:1 | Fails | Lc -13.8 | 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 800.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D3D8F0
oklch(88.6% 0.033 276.3)
-
Step 300
300
#B6BEE8
oklch(80.9% 0.06 276.5)
-
Step 400
400
#909BDD
oklch(70.6% 0.097 276.3)
-
Step 500
500
#7681D3
oklch(63% 0.124 276.5)
-
Step 600
600
#6069C1
oklch(55.6% 0.135 276.6)
-
Step 700
700
#4F57A6
oklch(49% 0.125 276.4)
-
Step 800
800 (this color)
#424988
oklch(43.1% 0.103 276.4)
-
Step 900
900
#373D6C
oklch(37.8% 0.08 276.4)
-
Step 950
950
#20243F
oklch(27.1% 0.05 276.1)
#424988 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) | #2F518A | 0.030 |
| Deuteranopia (no green cones) | #284C87 | 0.032 |
| Tritanopia (no blue cones) | #265662 | 0.090 |
| Achromatopsia (no color) | #4E4E4E | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424988
#424988
oklch(43.1% 0.103 276.4)
- #5F4F00
#5F4F00
oklch(43.1% 0.089 95.6)
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 #424988, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.033
- Blueberry #464196 ΔE 0.034
- Dusk Blue #26538D ΔE 0.039
- Dusk #4E5481 ΔE 0.042
- Cobalt #1E488F ΔE 0.043
- Light Navy #155084 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.050
Use #424988 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.