#3A2979
Closest named color: Indigo (#4B0082). oklch(35.1% 0.13 287.5), rgb(58, 41, 121).
Aa
White text reads best on this color (11.84:1).
About this color
#3A2979 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.130 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.063 away. White text reads best on it, at 11.84:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.77:1 |
| White text | 11.84:1 |
Values
| HEX | #3A2979 |
| RGB | rgb(58, 41, 121) |
| HSL | hsl(253, 49%, 32%) |
| OKLCH | oklch(35.1% 0.13 287.5) |
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 #3A2979 | 11.84:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #3A2979 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #3A2979 text on white | 11.84:1 | AAA | Lc 96.7 | Preferred for body text |
| #3A2979 text on black | 1.77:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E8E7FC
oklch(93.5% 0.028 288)
-
Step 200
200
#D6D4FC
oklch(88.4% 0.055 287.5)
-
Step 300
300
#BCB7FD
oklch(80.9% 0.098 287.3)
-
Step 400
400
#9C8FFB
oklch(70.7% 0.155 287.3)
-
Step 500
500
#876EF9
oklch(63.2% 0.199 287.6)
-
Step 600
600
#7351E8
oklch(55.7% 0.216 287.6)
-
Step 700
700
#6140C9
oklch(49.2% 0.2 287.7)
-
Step 800
800
#4E36A3
oklch(42.7% 0.167 287.2)
-
Step 900
900 (this color)
#3A2979
oklch(35.1% 0.13 287.5)
-
Step 950
950
#251D4C
oklch(26.9% 0.083 287.2)
#3A2979 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) | #00397C | 0.068 |
| Deuteranopia (no green cones) | #003577 | 0.066 |
| Tritanopia (no blue cones) | #243C4D | 0.106 |
| Achromatopsia (no color) | #373737 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A2979
#3A2979
oklch(35.1% 0.13 287.5)
- #3F3D00
#3F3D00
oklch(35.1% 0.075 107.6)
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 #3A2979, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.064
- Royal Purple #4B006E ΔE 0.072
- Midnight Blue #191970 ΔE 0.073
- Marine Blue #01386A ΔE 0.076
- Blueberry #464196 ΔE 0.079
- Twilight Blue #0A437A ΔE 0.080
- Marine #042E60 ΔE 0.081
Use #3A2979 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.