#424E8A
Closest named color: Twilight (#4E518B). oklch(44.4% 0.099 273.2), rgb(66, 78, 138).
Aa
White text reads best on this color (7.81:1).
About this color
#424E8A is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.099 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.021 away. White text reads best on it, at 7.81:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #424E8A |
| RGB | rgb(66, 78, 138) |
| HSL | hsl(230, 35%, 40%) |
| OKLCH | oklch(44.4% 0.099 273.2) |
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 #424E8A | 7.81:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #424E8A | 2.68:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #424E8A text on white | 7.81:1 | AAA | Lc 87.0 | Fine for body text |
| #424E8A text on black | 2.68:1 | Fails | Lc -15.1 | Dividers and decoration only |
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
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE7
oklch(81% 0.058 273)
-
Step 400
400
#8D9DDB
oklch(70.7% 0.093 272.7)
-
Step 500
500
#7283D1
oklch(63% 0.119 273.2)
-
Step 600
600
#5B6CBE
oklch(55.7% 0.128 272.8)
-
Step 700
700
#4B59A4
oklch(49% 0.121 273.2)
-
Step 800
800 (this color)
#424E8A
oklch(44.4% 0.099 273.2)
-
Step 900
900
#343E6A
oklch(37.7% 0.076 272.6)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#424E8A 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) | #36558C | 0.023 |
| Deuteranopia (no green cones) | #2E4F89 | 0.025 |
| Tritanopia (no blue cones) | #235B65 | 0.089 |
| Achromatopsia (no color) | #525252 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424E8A
#424E8A
oklch(44.4% 0.099 273.2)
- #655200
#655200
oklch(44.5% 0.091 93.4)
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 #424E8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.021
- Dusk #4E5481 ΔE 0.032
- Dusk Blue #26538D ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.040
- Blueberry #464196 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.046
- Light Navy #155084 ΔE 0.047
Use #424E8A 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.