#3A42A5
Closest named color: Blueberry (#464196). oklch(43.3% 0.157 274.3), rgb(58, 66, 165).
Aa
White text reads best on this color (8.39:1).
About this color
#3A42A5 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.157 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.030 away. White text reads best on it, at 8.39:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.50:1 |
| White text | 8.39:1 |
Values
| HEX | #3A42A5 |
| RGB | rgb(58, 66, 165) |
| HSL | hsl(236, 48%, 44%) |
| OKLCH | oklch(43.3% 0.157 274.3) |
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 #3A42A5 | 8.39:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #3A42A5 | 2.50:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #3A42A5 text on white | 8.39:1 | AAA | Lc 88.5 | Fine for body text |
| #3A42A5 text on black | 2.50:1 | Fails | Lc -13.7 | 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
#CED7FC
oklch(88.4% 0.052 274.5)
-
Step 300
300
#AEBDFD
oklch(81% 0.092 274)
-
Step 400
400
#8597FB
oklch(70.6% 0.147 274.3)
-
Step 500
500
#6A7AF9
oklch(63.2% 0.188 274.3)
-
Step 600
600
#545FE8
oklch(55.7% 0.204 274.2)
-
Step 700
700
#454DCA
oklch(49.1% 0.191 274.2)
-
Step 800
800 (this color)
#3A42A5
oklch(43.3% 0.157 274.3)
-
Step 900
900
#303881
oklch(37.8% 0.122 274.3)
-
Step 950
950
#1C214C
oklch(27% 0.079 274.8)
#3A42A5 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) | #0052A8 | 0.052 |
| Deuteranopia (no green cones) | #0049A3 | 0.045 |
| Tritanopia (no blue cones) | #005A6D | 0.130 |
| Achromatopsia (no color) | #4D4D4D | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A42A5
#3A42A5
oklch(43.3% 0.157 274.3)
- #614F00
#614F00
oklch(43.3% 0.089 93.7)
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 #3A42A5, closest first.
No curated palette has a color within ΔE 0.04 of #3A42A5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.030
- Sapphire #2138AB ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.047
- Cobalt #1E488F ΔE 0.050
- Blue Blue #2242C7 ΔE 0.060
- Majorelle Blue #3F37C9 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.065
- Dusk Blue #26538D ΔE 0.065
Use #3A42A5 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.