#3A42A3
Closest named color: Blueberry (#464196). oklch(43.2% 0.155 274.3), rgb(58, 66, 163).
Aa
White text reads best on this color (8.44:1).
About this color
#3A42A3 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.155 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.027 away. White text reads best on it, at 8.44:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.48:1 |
| White text | 8.44:1 |
Values
| HEX | #3A42A3 |
| RGB | rgb(58, 66, 163) |
| HSL | hsl(235, 48%, 43%) |
| OKLCH | oklch(43.2% 0.155 274.3) |
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 #3A42A3 | 8.44:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #3A42A3 | 2.48:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #3A42A3 text on white | 8.44:1 | AAA | Lc 88.7 | Fine for body text |
| #3A42A3 text on black | 2.48:1 | Fails | Lc -13.5 | 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
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CFD7FB
oklch(88.5% 0.05 275.4)
-
Step 300
300
#AEBDFB
oklch(80.9% 0.089 273.7)
-
Step 400
400
#8698FA
oklch(70.8% 0.144 274.3)
-
Step 500
500
#6A7AF7
oklch(63% 0.185 274.3)
-
Step 600
600
#555FE6
oklch(55.6% 0.202 274.5)
-
Step 700
700
#464EC8
oklch(49.2% 0.187 274.4)
-
Step 800
800 (this color)
#3A42A3
oklch(43.2% 0.155 274.3)
-
Step 900
900
#303880
oklch(37.7% 0.12 274.3)
-
Step 950
950
#1C224B
oklch(27.1% 0.076 274)
#3A42A3 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) | #0052A6 | 0.052 |
| Deuteranopia (no green cones) | #0049A1 | 0.045 |
| Tritanopia (no blue cones) | #005A6C | 0.130 |
| Achromatopsia (no color) | #4D4D4D | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A42A3
#3A42A3
oklch(43.2% 0.155 274.3)
- #604F00
#604F00
oklch(43.2% 0.089 94.6)
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 #3A42A3, closest first.
No curated palette has a color within ΔE 0.04 of #3A42A3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.027
- Sapphire #2138AB ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.045
- Cobalt #1E488F ΔE 0.048
- Blue Blue #2242C7 ΔE 0.063
- Dusk Blue #26538D ΔE 0.063
- Majorelle Blue #3F37C9 ΔE 0.064
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
Use #3A42A3 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.