#3A51CC
Closest named color: Warm Blue (#4B57DB). oklch(49.4% 0.191 269.8), rgb(58, 81, 204).
Aa
White text reads best on this color (6.50:1).
About this color
#3A51CC is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.191 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.036 away. White text reads best on it, at 6.50:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #3A51CC |
| RGB | rgb(58, 81, 204) |
| HSL | hsl(231, 59%, 51%) |
| OKLCH | oklch(49.4% 0.191 269.8) |
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 #3A51CC | 6.50:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #3A51CC | 3.22:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #3A51CC text on white | 6.50:1 | AA | Lc 81.7 | Fine for body text |
| #3A51CC text on black | 3.22:1 | AA large text | Lc -20.2 | 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
#CBD8FC
oklch(88.4% 0.052 269.6)
-
Step 300
300
#A9BEFD
oklch(80.8% 0.092 270)
-
Step 400
400
#7D9AFD
oklch(70.8% 0.149 270)
-
Step 500
500
#5E7DFA
oklch(63.1% 0.189 269.8)
-
Step 600
600
#4762E9
oklch(55.6% 0.205 269.8)
-
Step 700
700 (this color)
#3A51CC
oklch(49.4% 0.191 269.8)
-
Step 800
800
#2F42A4
oklch(42.6% 0.159 269.9)
-
Step 900
900
#293A82
oklch(37.8% 0.123 269.6)
-
Step 950
950
#18224C
oklch(26.9% 0.079 270.3)
#3A51CC 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) | #0065D0 | 0.052 |
| Deuteranopia (no green cones) | #0057CA | 0.035 |
| Tritanopia (no blue cones) | #007087 | 0.152 |
| Achromatopsia (no color) | #5E5E5E | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A51CC
#3A51CC
oklch(49.4% 0.191 269.8)
- #785E00
#785E00
oklch(49.4% 0.101 89.8)
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 #3A51CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.036
- Blue Blue #2242C7 ΔE 0.046
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
- Majorelle Blue #3F37C9 ΔE 0.053
- Blurple #5539CC ΔE 0.056
- Azul #1D5DEC ΔE 0.058
- Iris #6258C4 ΔE 0.061
- Bluey Purple #6241C7 ΔE 0.063
Use #3A51CC 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.