#3A51C5
Closest named color: Warm Blue (#4B57DB). oklch(48.8% 0.182 269.8), rgb(58, 81, 197).
Aa
White text reads best on this color (6.63:1).
About this color
#3A51C5 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.182 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.044 away. White text reads best on it, at 6.63:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.16:1 |
| White text | 6.63:1 |
Values
| HEX | #3A51C5 |
| RGB | rgb(58, 81, 197) |
| HSL | hsl(230, 55%, 50%) |
| OKLCH | oklch(48.8% 0.182 269.8) |
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 #3A51C5 | 6.63:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #3A51C5 | 3.16:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #3A51C5 text on white | 6.63:1 | AA | Lc 82.3 | Fine for body text |
| #3A51C5 text on black | 3.16:1 | AA large text | Lc -19.6 | 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 700.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#AABEFA
oklch(80.8% 0.088 270.1)
-
Step 400
400
#7E9BF8
oklch(70.8% 0.14 269.5)
-
Step 500
500
#607EF5
oklch(63.1% 0.18 269.9)
-
Step 600
600
#4964E4
oklch(55.6% 0.196 269.9)
-
Step 700
700 (this color)
#3A51C5
oklch(48.8% 0.182 269.8)
-
Step 800
800
#3044A0
oklch(42.7% 0.151 269.6)
-
Step 900
900
#2A3A7F
oklch(37.6% 0.118 270)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#3A51C5 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) | #0063C9 | 0.049 |
| Deuteranopia (no green cones) | #0056C3 | 0.036 |
| Tritanopia (no blue cones) | #006E83 | 0.147 |
| Achromatopsia (no color) | #5C5C5C | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A51C5
#3A51C5
oklch(48.8% 0.182 269.8)
- #765C00
#765C00
oklch(48.7% 0.1 89.5)
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 #3A51C5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.044
- Blue Blue #2242C7 ΔE 0.046
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
- Majorelle Blue #3F37C9 ΔE 0.054
- Blurple #5539CC ΔE 0.058
- Iris #6258C4 ΔE 0.060
- Bluey Purple #6241C7 ΔE 0.063
- Azul #1D5DEC ΔE 0.067
Use #3A51C5 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.