#537FEC
Closest named color: Soft Blue (#6488EA). oklch(62% 0.171 265.2), rgb(83, 127, 236).
Aa
Black text reads best on this color (5.61:1).
About this color
#537FEC is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.171 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.032 away. Black text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.61:1 |
| White text | 3.74:1 |
Values
| HEX | #537FEC |
| RGB | rgb(83, 127, 236) |
| HSL | hsl(223, 80%, 63%) |
| OKLCH | oklch(62% 0.171 265.2) |
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 #537FEC | 3.74:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #537FEC | 5.61:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #537FEC text on white | 3.74:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #537FEC text on black | 5.61:1 | AA | Lc -37.0 | 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
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9F9
oklch(88.4% 0.047 265.5)
-
Step 300
300
#A7C0F8
oklch(80.9% 0.084 265.9)
-
Step 400
400
#789EF4
oklch(70.8% 0.133 265.1)
-
Step 500
500 (this color)
#537FEC
oklch(62% 0.171 265.2)
-
Step 600
600
#3D69DE
oklch(55.6% 0.185 265.3)
-
Step 700
700
#2F57C1
oklch(49.2% 0.172 265)
-
Step 800
800
#28479C
oklch(42.6% 0.144 265.5)
-
Step 900
900
#243D7C
oklch(37.7% 0.111 265.2)
-
Step 950
950
#152449
oklch(27% 0.072 265.3)
#537FEC 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) | #488BF0 | 0.030 |
| Deuteranopia (no green cones) | #2A7DEA | 0.034 |
| Tritanopia (no blue cones) | #0098AA | 0.142 |
| Achromatopsia (no color) | #848484 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537FEC
#537FEC
oklch(62% 0.171 265.2)
- #A97F00
#A97F00
oklch(62.1% 0.127 85.2)
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 #537FEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.032
- Cornflower #6A79F7 ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.043
- Clear Blue #247AFD ΔE 0.047
- Dodger Blue #1E90FF ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.056
- Royal Blue #4169E1 ΔE 0.063
- Cornflower Blue #6495ED ΔE 0.063
Use #537FEC 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.