#357ADA
Closest named color: Windows Blue (#3778BF). oklch(58.6% 0.162 257.5), rgb(53, 122, 218).
Aa
Black text reads best on this color (4.94:1).
About this color
#357ADA is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.162 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.041 away. Black text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #357ADA |
| RGB | rgb(53, 122, 218) |
| HSL | hsl(215, 69%, 53%) |
| OKLCH | oklch(58.6% 0.162 257.5) |
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 #357ADA | 4.24:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #357ADA | 4.94:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #357ADA text on white | 4.24:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #357ADA text on black | 4.94:1 | AA | Lc -32.8 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DBF4
oklch(88.6% 0.04 256.6)
-
Step 300
300
#A3C3F0
oklch(80.9% 0.073 256.9)
-
Step 400
400
#71A2E9
oklch(70.7% 0.117 257.6)
-
Step 500
500
#4A89E2
oklch(63.1% 0.15 257.4)
-
Step 600
600 (this color)
#357ADA
oklch(58.6% 0.162 257.5)
-
Step 700
700
#1E5EB4
oklch(49.1% 0.151 257.4)
-
Step 800
800
#1B4D92
oklch(42.7% 0.126 257.6)
-
Step 900
900
#1C4174
oklch(37.7% 0.097 257.1)
-
Step 950
950
#122644
oklch(26.9% 0.062 258.3)
#357ADA 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) | #4983DE | 0.032 |
| Deuteranopia (no green cones) | #2774D8 | 0.020 |
| Tritanopia (no blue cones) | #00919F | 0.127 |
| Achromatopsia (no color) | #7B7B7B | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #357ADA
#357ADA
oklch(58.6% 0.162 257.5)
- #A47100
#A47100
oklch(58.6% 0.123 77.4)
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 #357ADA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.041
- Royal Blue #4169E1 ΔE 0.045
- Water Blue #0E87CC ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.052
- Clear Blue #247AFD ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.057
- Cool Blue #4984B8 ΔE 0.066
- Soft Blue #6488EA ΔE 0.067
Use #357ADA 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.