#537CE1
Closest named color: Soft Blue (#6488EA). oklch(60.7% 0.16 265.3), rgb(83, 124, 225).
Aa
Black text reads best on this color (5.33:1).
About this color
#537CE1 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.160 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.040 away. Black text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #537CE1 |
| RGB | rgb(83, 124, 225) |
| HSL | hsl(223, 70%, 60%) |
| OKLCH | oklch(60.7% 0.16 265.3) |
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 #537CE1 | 3.93:1 | AA large text | Lc -72.0 | Content text, not long reading |
| Black text on #537CE1 | 5.33:1 | AA | Lc 37.6 | Non-text elements, placeholder text |
| #537CE1 text on white | 3.93:1 | AA large text | Lc 66.5 | Content text, not long reading |
| #537CE1 text on black | 5.33:1 | AA | Lc -35.2 | 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 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
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
#7B9EEF
oklch(70.7% 0.125 265.6)
-
Step 500
500 (this color)
#537CE1
oklch(60.7% 0.16 265.3)
-
Step 600
600
#416BD8
oklch(55.7% 0.174 265.3)
-
Step 700
700
#3358BB
oklch(49.1% 0.162 265.4)
-
Step 800
800
#2B4997
oklch(42.8% 0.133 265.3)
-
Step 900
900
#263E78
oklch(37.7% 0.103 265)
-
Step 950
950
#172546
oklch(27.1% 0.064 265.1)
#537CE1 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) | #4B87E5 | 0.028 |
| Deuteranopia (no green cones) | #337ADF | 0.030 |
| Tritanopia (no blue cones) | #0093A3 | 0.135 |
| Achromatopsia (no color) | #808080 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537CE1
#537CE1
oklch(60.7% 0.16 265.3)
- #A47B00
#A47B00
oklch(60.7% 0.124 85.1)
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 #537CE1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.040
- Cornflower #6A79F7 ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.047
- Clear Blue #247AFD ΔE 0.055
- Royal Blue #4169E1 ΔE 0.055
- Windows Blue #3778BF ΔE 0.061
- Water Blue #0E87CC ΔE 0.062
- Chefchaouen Blue #4895EF ΔE 0.065
Use #537CE1 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.