#4243A7
Closest named color: Blueberry (#464196). oklch(44.2% 0.157 277.4), rgb(66, 67, 167).
Aa
White text reads best on this color (8.10:1).
About this color
#4243A7 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.157 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.028 away. White text reads best on it, at 8.10:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.59:1 |
| White text | 8.10:1 |
Values
| HEX | #4243A7 |
| RGB | rgb(66, 67, 167) |
| HSL | hsl(239, 43%, 46%) |
| OKLCH | oklch(44.2% 0.157 277.4) |
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 #4243A7 | 8.10:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #4243A7 | 2.59:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #4243A7 text on white | 8.10:1 | AAA | Lc 87.6 | Fine for body text |
| #4243A7 text on black | 2.59:1 | Fails | Lc -14.5 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FB
oklch(88.5% 0.05 276.6)
-
Step 300
300
#B2BBFC
oklch(80.8% 0.092 278)
-
Step 400
400
#8B96FA
oklch(70.7% 0.146 277.2)
-
Step 500
500
#7178F8
oklch(63.2% 0.188 277.2)
-
Step 600
600
#5C5CE6
oklch(55.5% 0.204 277.5)
-
Step 700
700
#4C4BC8
oklch(49.1% 0.189 277.2)
-
Step 800
800 (this color)
#4243A7
oklch(44.2% 0.157 277.4)
-
Step 900
900
#343680
oklch(37.6% 0.122 277.6)
-
Step 950
950
#1E214B
oklch(27.1% 0.077 276.9)
#4243A7 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) | #0054AA | 0.060 |
| Deuteranopia (no green cones) | #004CA5 | 0.055 |
| Tritanopia (no blue cones) | #005B6E | 0.135 |
| Achromatopsia (no color) | #505050 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4243A7
#4243A7
oklch(44.2% 0.157 277.4)
- #615300
#615300
oklch(44.3% 0.091 97.9)
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 #4243A7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.028
- Dark Slate Blue #483D8B ΔE 0.048
- Sapphire #2138AB ΔE 0.053
- Blue With A Hint Of Purple #533CC6 ΔE 0.057
- Cobalt #1E488F ΔE 0.059
- Majorelle Blue #3F37C9 ΔE 0.059
- Blue Blue #2242C7 ΔE 0.063
- Twilight #4E518B ΔE 0.066
Use #4243A7 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.