#537DE1
Closest named color: Soft Blue (#6488EA). oklch(60.9% 0.159 264.9), rgb(83, 125, 225).
Aa
Black text reads best on this color (5.38:1).
About this color
#537DE1 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.159 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.038 away. Black text reads best on it, at 5.38:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.38:1 |
| White text | 3.89:1 |
Values
| HEX | #537DE1 |
| RGB | rgb(83, 125, 225) |
| HSL | hsl(222, 70%, 60%) |
| OKLCH | oklch(60.9% 0.159 264.9) |
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 #537DE1 | 3.89:1 | AA large text | Lc -71.6 | Content text, not long reading |
| Black text on #537DE1 | 5.38:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #537DE1 text on white | 3.89:1 | AA large text | Lc 66.1 | Content text, not long reading |
| #537DE1 text on black | 5.38:1 | AA | Lc -35.5 | 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 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBD9F7
oklch(88.4% 0.044 265.6)
-
Step 300
300
#A8C0F4
oklch(80.8% 0.079 265.4)
-
Step 400
400
#7A9EEE
oklch(70.6% 0.124 265)
-
Step 500
500 (this color)
#537DE1
oklch(60.9% 0.159 264.9)
-
Step 600
600
#406BD7
oklch(55.6% 0.173 264.9)
-
Step 700
700
#3259BA
oklch(49.2% 0.16 264.7)
-
Step 800
800
#2A4997
oklch(42.7% 0.133 265)
-
Step 900
900
#263E78
oklch(37.7% 0.103 265)
-
Step 950
950
#162546
oklch(27.1% 0.065 264.1)
#537DE1 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) | #4D88E5 | 0.028 |
| Deuteranopia (no green cones) | #367BDF | 0.028 |
| Tritanopia (no blue cones) | #0094A4 | 0.134 |
| Achromatopsia (no color) | #818181 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537DE1
#537DE1
oklch(60.9% 0.159 264.9)
- #A57C00
#A57C00
oklch(61% 0.125 85.3)
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 #537DE1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.044
- Cornflower #6A79F7 ΔE 0.045
- Clear Blue #247AFD ΔE 0.056
- Royal Blue #4169E1 ΔE 0.057
- Water Blue #0E87CC ΔE 0.061
- Windows Blue #3778BF ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.062
Use #537DE1 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.