#3557D0
Closest named color: Warm Blue (#4B57DB). oklch(50.6% 0.191 267.2), rgb(53, 87, 208).
Aa
White text reads best on this color (6.13:1).
About this color
#3557D0 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.191 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.031 away. White text reads best on it, at 6.13:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.42:1 |
| White text | 6.13:1 |
Values
| HEX | #3557D0 |
| RGB | rgb(53, 87, 208) |
| HSL | hsl(227, 62%, 51%) |
| OKLCH | oklch(50.6% 0.191 267.2) |
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 #3557D0 | 6.13:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #3557D0 | 3.42:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #3557D0 text on white | 6.13:1 | AA | Lc 80.0 | Fine for body text |
| #3557D0 text on black | 3.42:1 | AA large text | Lc -21.8 | 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
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FC
oklch(88.5% 0.051 267)
-
Step 300
300
#A6BFFD
oklch(80.8% 0.092 267.4)
-
Step 400
400
#779BFC
oklch(70.6% 0.148 267.2)
-
Step 500
500
#577FFA
oklch(63.1% 0.189 267.3)
-
Step 600
600
#3E64E9
oklch(55.5% 0.205 267.2)
-
Step 700
700 (this color)
#3557D0
oklch(50.6% 0.191 267.2)
-
Step 800
800
#2944A4
oklch(42.7% 0.158 267.3)
-
Step 900
900
#243B82
oklch(37.7% 0.123 266.8)
-
Step 950
950
#15234C
oklch(27% 0.078 266.9)
#3557D0 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) | #0069D4 | 0.046 |
| Deuteranopia (no green cones) | #005BCE | 0.028 |
| Tritanopia (no blue cones) | #00758B | 0.150 |
| Achromatopsia (no color) | #626262 | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3557D0
#3557D0
oklch(50.6% 0.191 267.2)
- #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 #3557D0, closest first.
No curated palette has a color within ΔE 0.04 of #3557D0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.031
- Azul #1D5DEC ΔE 0.046
- Royal Blue #4169E1 ΔE 0.054
- Neon Blue #4361EE ΔE 0.055
- Blue Blue #2242C7 ΔE 0.057
- Iris #6258C4 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Majorelle Blue #3F37C9 ΔE 0.067
Use #3557D0 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.