#3A43B9
Closest named color: Majorelle Blue (#3F37C9). oklch(45.2% 0.183 273.2), rgb(58, 67, 185).
Aa
White text reads best on this color (7.82:1).
About this color
#3A43B9 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.183 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Majorelle Blue (#3F37C9), ΔE 0.033 away. White text reads best on it, at 7.82:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Majorelle Blue (#3F37C9) |
| Black text | 2.68:1 |
| White text | 7.82:1 |
Values
| HEX | #3A43B9 |
| RGB | rgb(58, 67, 185) |
| HSL | hsl(236, 52%, 48%) |
| OKLCH | oklch(45.2% 0.183 273.2) |
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 #3A43B9 | 7.82:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #3A43B9 | 2.68:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #3A43B9 text on white | 7.82:1 | AAA | Lc 86.6 | Fine for body text |
| #3A43B9 text on black | 2.68:1 | Fails | Lc -15.5 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8297FF
oklch(70.6% 0.154 273.2)
-
Step 500
500
#6679FF
oklch(63.1% 0.198 273.3)
-
Step 600
600
#4E57FB
oklch(55.6% 0.239 273.2)
-
Step 700
700
#4046DB
oklch(49.2% 0.221 273)
-
Step 800
800 (this color)
#3A43B9
oklch(45.2% 0.183 273.2)
-
Step 900
900
#2C358B
oklch(37.7% 0.142 273)
-
Step 950
950
#192052
oklch(27% 0.091 272.8)
#3A43B9 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) | #0058BD | 0.056 |
| Deuteranopia (no green cones) | #004CB7 | 0.043 |
| Tritanopia (no blue cones) | #006178 | 0.147 |
| Achromatopsia (no color) | #525252 | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A43B9
#3A43B9
oklch(45.2% 0.183 273.2)
- #685400
#685400
oklch(45.3% 0.093 92.9)
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 #3A43B9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Majorelle Blue #3F37C9 ΔE 0.033
- Blue Blue #2242C7 ΔE 0.034
- Blue With A Hint Of Purple #533CC6 ΔE 0.042
- Sapphire #2138AB ΔE 0.049
- Blurple #5539CC ΔE 0.051
- Blueberry #464196 ΔE 0.059
- Bluey Purple #6241C7 ΔE 0.065
- Indigo Blue #3A18B1 ΔE 0.076
Use #3A43B9 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.