#424E97
Closest named color: Twilight (#4E518B). oklch(45.2% 0.119 273.7), rgb(66, 78, 151).
Aa
White text reads best on this color (7.58:1).
About this color
#424E97 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.119 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.029 away. White text reads best on it, at 7.58:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.76:1 |
| White text | 7.58:1 |
Values
| HEX | #424E97 |
| RGB | rgb(66, 78, 151) |
| HSL | hsl(232, 39%, 43%) |
| OKLCH | oklch(45.2% 0.119 273.7) |
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 #424E97 | 7.58:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #424E97 | 2.76:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #424E97 text on white | 7.58:1 | AAA | Lc 86.2 | Fine for body text |
| #424E97 text on black | 2.76:1 | Fails | Lc -15.9 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B2BEEE
oklch(80.9% 0.069 273.8)
-
Step 400
400
#8B9BE6
oklch(70.7% 0.111 274)
-
Step 500
500
#6F81DF
oklch(63.2% 0.142 273.5)
-
Step 600
600
#5868CC
oklch(55.6% 0.154 273.5)
-
Step 700
700
#4956B1
oklch(49.1% 0.144 273.8)
-
Step 800
800 (this color)
#424E97
oklch(45.2% 0.119 273.7)
-
Step 900
900
#333C72
oklch(37.7% 0.092 274)
-
Step 950
950
#1E2443
oklch(27.2% 0.058 273.7)
#424E97 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) | #2C589A | 0.034 |
| Deuteranopia (no green cones) | #215095 | 0.036 |
| Tritanopia (no blue cones) | #145E6B | 0.105 |
| Achromatopsia (no color) | #545454 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424E97
#424E97
oklch(45.2% 0.119 273.7)
- #675400
#675400
oklch(45.2% 0.093 93.7)
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 #424E97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.029
- Blueberry #464196 ΔE 0.034
- Dusk Blue #26538D ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.046
- Dusk #4E5481 ΔE 0.047
- Cobalt #1E488F ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.050
Use #424E97 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.