#537DF9
Closest named color: Cornflower (#6A79F7). oklch(62.5% 0.191 266.7), rgb(83, 125, 249).
Aa
Black text reads best on this color (5.66:1).
About this color
#537DF9 is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.191 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.026 away. Black text reads best on it, at 5.66:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.66:1 |
| White text | 3.70:1 |
Values
| HEX | #537DF9 |
| RGB | rgb(83, 125, 249) |
| HSL | hsl(225, 93%, 65%) |
| OKLCH | oklch(62.5% 0.191 266.7) |
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 #537DF9 | 3.70:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #537DF9 | 5.66:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #537DF9 text on white | 3.70:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #537DF9 text on black | 5.66:1 | AA | Lc -37.4 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FC
oklch(88.5% 0.051 267)
-
Step 300
300
#A5BFFE
oklch(80.8% 0.094 267)
-
Step 400
400
#769CFD
oklch(70.8% 0.148 266.5)
-
Step 500
500 (this color)
#537DF9
oklch(62.5% 0.191 266.7)
-
Step 600
600
#3C64EA
oklch(55.5% 0.207 266.7)
-
Step 700
700
#2F52CC
oklch(49.1% 0.193 266.7)
-
Step 800
800
#2744A5
oklch(42.7% 0.16 266.7)
-
Step 900
900
#233B83
oklch(37.8% 0.125 266.5)
-
Step 950
950
#15234C
oklch(27% 0.078 266.9)
#537DF9 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) | #348DFD | 0.042 |
| Deuteranopia (no green cones) | #007EF6 | 0.045 |
| Tritanopia (no blue cones) | #009AAF | 0.157 |
| Achromatopsia (no color) | #858585 | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537DF9
#537DF9
oklch(62.5% 0.191 266.7)
- #A98100
#A98100
oklch(62.5% 0.128 86.7)
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 #537DF9, closest first.
No curated palette has a color within ΔE 0.04 of #537DF9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.026
- Clear Blue #247AFD ΔE 0.038
- Soft Blue #6488EA ΔE 0.044
- Dodger Blue #1E90FF ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.058
- Royal Blue #4169E1 ΔE 0.065
- Chefchaouen Blue #4895EF ΔE 0.065
- Medium Slate Blue #7B68EE ΔE 0.066
Use #537DF9 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.