#3551B6
Closest named color: Blue Blue (#2242C7). oklch(47.4% 0.163 267.9), rgb(53, 81, 182).
Aa
White text reads best on this color (6.99:1).
About this color
#3551B6 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.163 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.050 away. White text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.00:1 |
| White text | 6.99:1 |
Values
| HEX | #3551B6 |
| RGB | rgb(53, 81, 182) |
| HSL | hsl(227, 55%, 46%) |
| OKLCH | oklch(47.4% 0.163 267.9) |
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 #3551B6 | 6.99:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #3551B6 | 3.00:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #3551B6 text on white | 6.99:1 | AA | Lc 83.8 | Fine for body text |
| #3551B6 text on black | 3.00:1 | AA large text | Lc -18.2 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ABBFF5
oklch(80.9% 0.08 268.8)
-
Step 400
400
#7F9DF0
oklch(70.8% 0.127 268)
-
Step 500
500
#5F82EA
oklch(63.1% 0.161 267.6)
-
Step 600
600
#4869D9
oklch(55.7% 0.176 267.9)
-
Step 700
700 (this color)
#3551B6
oklch(47.4% 0.163 267.9)
-
Step 800
800
#2F4798
oklch(42.6% 0.136 267.8)
-
Step 900
900
#2A3D79
oklch(37.8% 0.105 267.9)
-
Step 950
950
#182447
oklch(27% 0.067 267.5)
#3551B6 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) | #005FB9 | 0.042 |
| Deuteranopia (no green cones) | #0053B4 | 0.032 |
| Tritanopia (no blue cones) | #006A7B | 0.133 |
| Achromatopsia (no color) | #595959 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3551B6
#3551B6
oklch(47.4% 0.163 267.9)
- #725800
#725800
oklch(47.4% 0.097 88.7)
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 #3551B6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.050
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.062
- Blueberry #464196 ΔE 0.064
- Warm Blue #4B57DB ΔE 0.067
- Mid Blue #276AB3 ΔE 0.067
- Denim Blue #3B5B92 ΔE 0.068
- Iris #6258C4 ΔE 0.069
Use #3551B6 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.