#3555D4
Closest named color: Warm Blue (#4B57DB). oklch(50.6% 0.198 267.7), rgb(53, 85, 212).
Aa
White text reads best on this color (6.17:1).
About this color
#3555D4 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.198 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.029 away. White text reads best on it, at 6.17:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.198) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.40:1 |
| White text | 6.17:1 |
Values
| HEX | #3555D4 |
| RGB | rgb(53, 85, 212) |
| HSL | hsl(228, 65%, 52%) |
| OKLCH | oklch(50.6% 0.198 267.7) |
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 #3555D4 | 6.17:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #3555D4 | 3.40:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #3555D4 text on white | 6.17:1 | AA | Lc 80.2 | Fine for body text |
| #3555D4 text on black | 3.40:1 | AA large text | Lc -21.6 | 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
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FD
oklch(88.6% 0.052 267.4)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#779BFF
oklch(70.7% 0.152 267.5)
-
Step 500
500
#567EFE
oklch(63.2% 0.195 267.5)
-
Step 600
600
#3E62EE
oklch(55.5% 0.214 267.7)
-
Step 700
700 (this color)
#3555D4
oklch(50.6% 0.198 267.7)
-
Step 800
800
#2943A7
oklch(42.8% 0.164 267.7)
-
Step 900
900
#243A84
oklch(37.7% 0.127 267.4)
-
Step 950
950
#15234E
oklch(27.1% 0.081 267.2)
#3555D4 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 | 0.050 |
| Deuteranopia (no green cones) | #005AD2 | 0.029 |
| Tritanopia (no blue cones) | #00758C | 0.156 |
| Achromatopsia (no color) | #616161 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3555D4
#3555D4
oklch(50.6% 0.198 267.7)
- #7E6000
#7E6000
oklch(50.6% 0.103 87.2)
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 #3555D4, closest first.
No curated palette has a color within ΔE 0.04 of #3555D4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.029
- Azul #1D5DEC ΔE 0.042
- Neon Blue #4361EE ΔE 0.053
- Blue Blue #2242C7 ΔE 0.055
- Royal Blue #4169E1 ΔE 0.055
- Blue With A Hint Of Purple #533CC6 ΔE 0.064
- Majorelle Blue #3F37C9 ΔE 0.064
- Iris #6258C4 ΔE 0.065
Use #3555D4 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.