#424787
Closest named color: Dark Slate Blue (#483D8B). oklch(42.7% 0.105 277.6), rgb(66, 71, 135).
Aa
White text reads best on this color (8.45:1).
About this color
#424787 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.105 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 8.45:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.48:1 |
| White text | 8.45:1 |
Values
| HEX | #424787 |
| RGB | rgb(66, 71, 135) |
| HSL | hsl(236, 34%, 39%) |
| OKLCH | oklch(42.7% 0.105 277.6) |
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 #424787 | 8.45:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #424787 | 2.48:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #424787 text on white | 8.45:1 | AAA | Lc 89.0 | Fine for body text |
| #424787 text on black | 2.48:1 | Fails | Lc -13.2 | 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
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D3D8F0
oklch(88.6% 0.033 276.3)
-
Step 300
300
#B6BEE9
oklch(81% 0.061 276.7)
-
Step 400
400
#929BDD
oklch(70.8% 0.097 277.6)
-
Step 500
500
#7881D4
oklch(63.2% 0.125 277.5)
-
Step 600
600
#6168C1
oklch(55.5% 0.137 277.6)
-
Step 700
700
#5157A7
oklch(49.2% 0.126 277.5)
-
Step 800
800 (this color)
#424787
oklch(42.7% 0.105 277.6)
-
Step 900
900
#383C6C
oklch(37.7% 0.082 278.1)
-
Step 950
950
#20233F
oklch(26.8% 0.052 277.6)
#424787 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) | #2C5089 | 0.034 |
| Deuteranopia (no green cones) | #264A86 | 0.035 |
| Tritanopia (no blue cones) | #275560 | 0.093 |
| Achromatopsia (no color) | #4D4D4D | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424787
#424787
oklch(42.7% 0.105 277.6)
- #5C4E00
#5C4E00
oklch(42.5% 0.088 97.2)
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 #424787, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.031
- Twilight #4E518B ΔE 0.035
- Dusk Blue #26538D ΔE 0.043
- Cobalt #1E488F ΔE 0.043
- Dusk #4E5481 ΔE 0.046
- Light Navy #155084 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.056
Use #424787 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.