#3A3CAA
Closest named color: Sapphire (#2138AB). oklch(42.7% 0.172 275.5), rgb(58, 60, 170).
Aa
White text reads best on this color (8.72:1).
About this color
#3A3CAA is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.172 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.034 away. White text reads best on it, at 8.72:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.40:1 |
| White text | 8.72:1 |
Values
| HEX | #3A3CAA |
| RGB | rgb(58, 60, 170) |
| HSL | hsl(239, 49%, 45%) |
| OKLCH | oklch(42.7% 0.172 275.5) |
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 #3A3CAA | 8.72:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #3A3CAA | 2.40:1 | Fails | Lc 14.6 | Not readable |
| #3A3CAA text on white | 8.72:1 | AAA | Lc 89.4 | Fine for body text |
| #3A3CAA text on black | 2.40:1 | Fails | Lc -12.9 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CED7FF
oklch(88.5% 0.056 275.2)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400
#8796FF
oklch(70.7% 0.154 275.6)
-
Step 500
500
#6C77FF
oklch(63.2% 0.199 275.6)
-
Step 600
600
#5659F2
oklch(55.6% 0.224 275.5)
-
Step 700
700
#4748D2
oklch(49.1% 0.206 275.4)
-
Step 800
800 (this color)
#3A3CAA
oklch(42.7% 0.172 275.5)
-
Step 900
900
#313587
oklch(37.7% 0.135 275.7)
-
Step 950
950
#1C204F
oklch(27% 0.085 275.5)
#3A3CAA 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) | #0050AD | 0.058 |
| Deuteranopia (no green cones) | #0046A8 | 0.047 |
| Tritanopia (no blue cones) | #00586D | 0.141 |
| Achromatopsia (no color) | #4B4B4B | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A3CAA
#3A3CAA
oklch(42.7% 0.172 275.5)
- #5E4E00
#5E4E00
oklch(42.8% 0.088 95.4)
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 #3A3CAA, closest first.
No curated palette has a color within ΔE 0.04 of #3A3CAA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.034
- Blueberry #464196 ΔE 0.040
- Majorelle Blue #3F37C9 ΔE 0.050
- Blue Blue #2242C7 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.055
- Blue With A Hint Of Purple #533CC6 ΔE 0.059
- Indigo Blue #3A18B1 ΔE 0.060
- Cobalt #1E488F ΔE 0.061
Use #3A3CAA 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.