#357AD2
Closest named color: Windows Blue (#3778BF). oklch(58% 0.152 256), rgb(53, 122, 210).
Aa
Black text reads best on this color (4.86:1).
About this color
#357AD2 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.152 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.029 away. Black text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #357AD2 |
| RGB | rgb(53, 122, 210) |
| HSL | hsl(214, 64%, 52%) |
| OKLCH | oklch(58% 0.152 256) |
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 #357AD2 | 4.31:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #357AD2 | 4.86:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #357AD2 text on white | 4.31:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #357AD2 text on black | 4.86:1 | AA | Lc -32.2 | 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3ED
oklch(80.9% 0.069 256.1)
-
Step 400
400
#72A3E4
oklch(70.7% 0.109 255.8)
-
Step 500
500
#4C8ADC
oklch(63% 0.14 256.1)
-
Step 600
600 (this color)
#357AD2
oklch(58% 0.152 256)
-
Step 700
700
#1F60AF
oklch(49.2% 0.142 255.8)
-
Step 800
800
#1C4E8D
oklch(42.6% 0.117 256)
-
Step 900
900
#1D4271
oklch(37.8% 0.091 255.6)
-
Step 950
950
#122742
oklch(27.1% 0.057 255.5)
#357AD2 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) | #4F81D5 | 0.032 |
| Deuteranopia (no green cones) | #3373D0 | 0.019 |
| Tritanopia (no blue cones) | #008F9C | 0.117 |
| Achromatopsia (no color) | #7A7A7A | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #357AD2
#357AD2
oklch(58% 0.152 256)
- #A36F00
#A36F00
oklch(58.1% 0.122 76.4)
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 #357AD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.029
- Water Blue #0E87CC ΔE 0.040
- Royal Blue #4169E1 ΔE 0.052
- Cool Blue #4984B8 ΔE 0.057
- Steel Blue #4682B4 ΔE 0.058
- Nice Blue #107AB0 ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.060
- Cerulean Blue #056EEE ΔE 0.061
Use #357AD2 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.