#3A43A1
Closest named color: Blueberry (#464196). oklch(43.2% 0.151 274.1), rgb(58, 67, 161).
Aa
White text reads best on this color (8.40:1).
About this color
#3A43A1 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.151 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.025 away. White text reads best on it, at 8.40:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.49:1 |
| White text | 8.40:1 |
Values
| HEX | #3A43A1 |
| RGB | rgb(58, 67, 161) |
| HSL | hsl(235, 47%, 43%) |
| OKLCH | oklch(43.2% 0.151 274.1) |
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 #3A43A1 | 8.40:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #3A43A1 | 2.49:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #3A43A1 text on white | 8.40:1 | AAA | Lc 88.6 | Fine for body text |
| #3A43A1 text on black | 2.49:1 | Fails | Lc -13.6 | 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
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CFD7FA
oklch(88.4% 0.049 275.2)
-
Step 300
300
#AFBDFA
oklch(80.9% 0.088 274.3)
-
Step 400
400
#8698F8
oklch(70.7% 0.142 274.2)
-
Step 500
500
#6A7BF4
oklch(63% 0.18 274)
-
Step 600
600
#5561E3
oklch(55.7% 0.195 274.2)
-
Step 700
700
#464FC5
oklch(49.1% 0.181 274.3)
-
Step 800
800 (this color)
#3A43A1
oklch(43.2% 0.151 274.1)
-
Step 900
900
#30397F
oklch(37.8% 0.118 273.9)
-
Step 950
950
#1C224A
oklch(27% 0.074 274)
#3A43A1 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) | #0052A4 | 0.051 |
| Deuteranopia (no green cones) | #00499F | 0.045 |
| Tritanopia (no blue cones) | #005A6B | 0.127 |
| Achromatopsia (no color) | #4D4D4D | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A43A1
#3A43A1
oklch(43.2% 0.151 274.1)
- #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 #3A43A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.025
- Dark Slate Blue #483D8B ΔE 0.042
- Cobalt #1E488F ΔE 0.045
- Sapphire #2138AB ΔE 0.046
- Dusk Blue #26538D ΔE 0.059
- Twilight #4E518B ΔE 0.064
- Blue Blue #2242C7 ΔE 0.066
- Majorelle Blue #3F37C9 ΔE 0.068
Use #3A43A1 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.