#538DC4
Closest named color: Faded Blue (#658CBB). oklch(62.7% 0.103 248.6), rgb(83, 141, 196).
Aa
Black text reads best on this color (5.97:1).
About this color
#538DC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.103 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.022 away. Black text reads best on it, at 5.97:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.97:1 |
| White text | 3.51:1 |
Values
| HEX | #538DC4 |
| RGB | rgb(83, 141, 196) |
| HSL | hsl(209, 49%, 55%) |
| OKLCH | oklch(62.7% 0.103 248.6) |
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 #538DC4 | 3.51:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #538DC4 | 5.97:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #538DC4 text on white | 3.51:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #538DC4 text on black | 5.97:1 | AA | Lc -39.1 | 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
#CBDBEB
oklch(88.4% 0.028 248.1)
-
Step 300
300
#A8C4E0
oklch(80.9% 0.05 248.4)
-
Step 400
400
#78A5D1
oklch(70.6% 0.081 248.5)
-
Step 500
500 (this color)
#538DC4
oklch(62.7% 0.103 248.6)
-
Step 600
600
#3777B2
oklch(55.5% 0.113 248.9)
-
Step 700
700
#296499
oklch(49.1% 0.105 248.7)
-
Step 800
800
#23527C
oklch(42.7% 0.087 248.3)
-
Step 900
900
#224464
oklch(37.7% 0.068 248.8)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#538DC4 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) | #768FC6 | 0.041 |
| Deuteranopia (no green cones) | #6784C3 | 0.030 |
| Tritanopia (no blue cones) | #009AA0 | 0.087 |
| Achromatopsia (no color) | #898989 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538DC4
#538DC4
oklch(62.7% 0.103 248.6)
- #B17C3D
#B17C3D
oklch(62.8% 0.103 68.6)
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 #538DC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.022
- Cool Blue #4984B8 ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.036
- Off Blue #5684AE ΔE 0.037
- Steel Blue #4682B4 ΔE 0.040
- Water Blue #0E87CC ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.049
- Blue NCS #118AB2 ΔE 0.053
Use #538DC4 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.