#537DDF
Closest named color: Soft Blue (#6488EA). oklch(60.8% 0.156 264.7), rgb(83, 125, 223).
Aa
Black text reads best on this color (5.36:1).
About this color
#537DDF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.156 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.039 away. Black text reads best on it, at 5.36:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.36:1 |
| White text | 3.91:1 |
Values
| HEX | #537DDF |
| RGB | rgb(83, 125, 223) |
| HSL | hsl(222, 69%, 60%) |
| OKLCH | oklch(60.8% 0.156 264.7) |
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 #537DDF | 3.91:1 | AA large text | Lc -71.8 | Content text, not long reading |
| Black text on #537DDF | 5.36:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #537DDF text on white | 3.91:1 | AA large text | Lc 66.3 | Content text, not long reading |
| #537DDF text on black | 5.36:1 | AA | Lc -35.4 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CBD9F6
oklch(88.4% 0.043 265)
-
Step 300
300
#A8C1F3
oklch(81% 0.076 264)
-
Step 400
400
#7B9FED
oklch(70.8% 0.122 264.6)
-
Step 500
500 (this color)
#537DDF
oklch(60.8% 0.156 264.7)
-
Step 600
600
#406CD5
oklch(55.7% 0.169 264.5)
-
Step 700
700
#3359B9
oklch(49.1% 0.158 264.9)
-
Step 800
800
#2A4995
oklch(42.6% 0.13 264.7)
-
Step 900
900
#263E77
oklch(37.7% 0.102 264.8)
-
Step 950
950
#162546
oklch(27.1% 0.065 264.1)
#537DDF 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) | #4F88E3 | 0.028 |
| Deuteranopia (no green cones) | #387BDD | 0.026 |
| Tritanopia (no blue cones) | #0093A3 | 0.131 |
| Achromatopsia (no color) | #818181 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537DDF
#537DDF
oklch(60.8% 0.156 264.7)
- #A57B00
#A57B00
oklch(60.8% 0.125 84.5)
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 #537DDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.044
- Cornflower #6A79F7 ΔE 0.047
- Royal Blue #4169E1 ΔE 0.058
- Clear Blue #247AFD ΔE 0.058
- Windows Blue #3778BF ΔE 0.059
- Water Blue #0E87CC ΔE 0.059
- Chefchaouen Blue #4895EF ΔE 0.063
Use #537DDF 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.