#3155D4
Closest named color: Warm Blue (#4B57DB). oklch(50.4% 0.199 266.7), rgb(49, 85, 212).
Aa
White text reads best on this color (6.21:1).
About this color
#3155D4 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.199 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.032 away. White text reads best on it, at 6.21:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.38:1 |
| White text | 6.21:1 |
Values
| HEX | #3155D4 |
| RGB | rgb(49, 85, 212) |
| HSL | hsl(227, 65%, 51%) |
| OKLCH | oklch(50.4% 0.199 266.7) |
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 #3155D4 | 6.21:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #3155D4 | 3.38:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #3155D4 text on white | 6.21:1 | AA | Lc 80.3 | Fine for body text |
| #3155D4 text on black | 3.38:1 | AA large text | Lc -21.5 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500
#537EFF
oklch(63.1% 0.197 266.8)
-
Step 600
600
#3B63EE
oklch(55.6% 0.214 266.8)
-
Step 700
700 (this color)
#3155D4
oklch(50.4% 0.199 266.7)
-
Step 800
800
#2643A8
oklch(42.7% 0.166 266.8)
-
Step 900
900
#223A85
oklch(37.7% 0.129 266.7)
-
Step 950
950
#14234E
oklch(27.1% 0.082 266.5)
#3155D4 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) | #0069D8 | 0.049 |
| Deuteranopia (no green cones) | #0059D2 | 0.025 |
| Tritanopia (no blue cones) | #00758C | 0.156 |
| Achromatopsia (no color) | #616161 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3155D4
#3155D4
oklch(50.4% 0.199 266.7)
- #7E5F00
#7E5F00
oklch(50.3% 0.103 86.3)
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 #3155D4, closest first.
No curated palette has a color within ΔE 0.04 of #3155D4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.032
- Azul #1D5DEC ΔE 0.041
- Blue Blue #2242C7 ΔE 0.053
- Neon Blue #4361EE ΔE 0.054
- Royal Blue #4169E1 ΔE 0.057
- Majorelle Blue #3F37C9 ΔE 0.064
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Iris #6258C4 ΔE 0.068
Use #3155D4 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.