#538BC1
Closest named color: Faded Blue (#658CBB). oklch(62.1% 0.101 248.9), rgb(83, 139, 193).
Aa
Black text reads best on this color (5.83:1).
About this color
#538BC1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.101 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.021 away. Black text reads best on it, at 5.83:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.83:1 |
| White text | 3.60:1 |
Values
| HEX | #538BC1 |
| RGB | rgb(83, 139, 193) |
| HSL | hsl(209, 47%, 54%) |
| OKLCH | oklch(62.1% 0.101 248.9) |
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 #538BC1 | 3.60:1 | AA large text | Lc -68.9 | Content text, not long reading |
| Black text on #538BC1 | 5.83:1 | AA | Lc 40.6 | Non-text elements, placeholder text |
| #538BC1 text on white | 3.60:1 | AA large text | Lc 63.4 | Content text, not long reading |
| #538BC1 text on black | 5.83:1 | AA | Lc -38.2 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEB
oklch(88.5% 0.027 249.9)
-
Step 300
300
#A9C4E0
oklch(80.9% 0.049 249.4)
-
Step 400
400
#7AA5D0
oklch(70.7% 0.079 249)
-
Step 500
500 (this color)
#538BC1
oklch(62.1% 0.101 248.9)
-
Step 600
600
#3977B1
oklch(55.5% 0.111 249.1)
-
Step 700
700
#2B6498
oklch(49.1% 0.103 248.9)
-
Step 800
800
#25527B
oklch(42.7% 0.084 248.5)
-
Step 900
900
#234463
oklch(37.7% 0.066 248.6)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#538BC1 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) | #748DC3 | 0.039 |
| Deuteranopia (no green cones) | #6682C0 | 0.030 |
| Tritanopia (no blue cones) | #00989E | 0.086 |
| Achromatopsia (no color) | #878787 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538BC1
#538BC1
oklch(62.1% 0.101 248.9)
- #AE7B3D
#AE7B3D
oklch(62.2% 0.101 69.3)
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 #538BC1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.021
- Cool Blue #4984B8 ΔE 0.025
- Dusty Blue #5A86AD ΔE 0.030
- Off Blue #5684AE ΔE 0.031
- Steel Blue #4682B4 ΔE 0.034
- Water Blue #0E87CC ΔE 0.047
- Blue NCS #118AB2 ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.052
Use #538BC1 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.