#538EC7
Closest named color: Faded Blue (#658CBB). oklch(63.1% 0.106 249.1), rgb(83, 142, 199).
Aa
Black text reads best on this color (6.06:1).
About this color
#538EC7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.106 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.024 away. Black text reads best on it, at 6.06:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.06:1 |
| White text | 3.46:1 |
Values
| HEX | #538EC7 |
| RGB | rgb(83, 142, 199) |
| HSL | hsl(209, 51%, 55%) |
| OKLCH | oklch(63.1% 0.106 249.1) |
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 #538EC7 | 3.46:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #538EC7 | 6.06:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #538EC7 text on white | 3.46:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #538EC7 text on black | 6.06:1 | AA | Lc -39.7 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A7C4E1
oklch(80.8% 0.052 248.5)
-
Step 400
400
#78A5D3
oklch(70.7% 0.083 249.6)
-
Step 500
500 (this color)
#538EC7
oklch(63.1% 0.106 249.1)
-
Step 600
600
#3677B4
oklch(55.6% 0.116 249.4)
-
Step 700
700
#28649B
oklch(49.1% 0.108 249.3)
-
Step 800
800
#22527D
oklch(42.7% 0.088 248.5)
-
Step 900
900
#224465
oklch(37.7% 0.069 249.5)
-
Step 950
950
#14283B
oklch(27% 0.044 248.6)
#538EC7 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) | #7690CA | 0.041 |
| Deuteranopia (no green cones) | #6785C6 | 0.030 |
| Tritanopia (no blue cones) | #009BA2 | 0.088 |
| Achromatopsia (no color) | #8A8A8A | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538EC7
#538EC7
oklch(63.1% 0.106 249.1)
- #B37D3B
#B37D3B
oklch(63.2% 0.106 69.1)
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 #538EC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.024
- Cool Blue #4984B8 ΔE 0.036
- Dusty Blue #5A86AD ΔE 0.040
- Off Blue #5684AE ΔE 0.042
- Steel Blue #4682B4 ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.045
- Water Blue #0E87CC ΔE 0.049
- Blue NCS #118AB2 ΔE 0.056
Use #538EC7 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.