#3551CD
Closest named color: Warm Blue (#4B57DB). oklch(49.2% 0.194 268.4), rgb(53, 81, 205).
Aa
White text reads best on this color (6.54:1).
About this color
#3551CD is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.194 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.039 away. White text reads best on it, at 6.54:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.20:1 |
| White text | 6.54:1 |
Values
| HEX | #3551CD |
| RGB | rgb(53, 81, 205) |
| HSL | hsl(229, 60%, 51%) |
| OKLCH | oklch(49.2% 0.194 268.4) |
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 #3551CD | 6.54:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #3551CD | 3.20:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #3551CD text on white | 6.54:1 | AA | Lc 81.8 | Fine for body text |
| #3551CD text on black | 3.20:1 | AA large text | Lc -20.1 | 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
#A7BFFE
oklch(81% 0.093 268.2)
-
Step 400
400
#799BFE
oklch(70.8% 0.15 268.1)
-
Step 500
500
#597EFC
oklch(63.2% 0.192 268.2)
-
Step 600
600
#4263EB
oklch(55.7% 0.208 268.4)
-
Step 700
700 (this color)
#3551CD
oklch(49.2% 0.194 268.4)
-
Step 800
800
#2B43A5
oklch(42.7% 0.16 268.2)
-
Step 900
900
#263A83
oklch(37.7% 0.125 268.3)
-
Step 950
950
#16234D
oklch(27.1% 0.079 267.9)
#3551CD 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) | #0065D1 | 0.050 |
| Deuteranopia (no green cones) | #0057CB | 0.031 |
| Tritanopia (no blue cones) | #007187 | 0.154 |
| Achromatopsia (no color) | #5D5D5D | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3551CD
#3551CD
oklch(49.2% 0.194 268.4)
- #795D00
#795D00
oklch(49.3% 0.101 88.1)
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 #3551CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.039
- Blue Blue #2242C7 ΔE 0.043
- Majorelle Blue #3F37C9 ΔE 0.053
- Azul #1D5DEC ΔE 0.055
- Blue With A Hint Of Purple #533CC6 ΔE 0.055
- Blurple #5539CC ΔE 0.059
- Iris #6258C4 ΔE 0.066
- Neon Blue #4361EE ΔE 0.066
Use #3551CD 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.