#538CC4
Closest named color: Faded Blue (#658CBB). oklch(62.5% 0.104 249.4), rgb(83, 140, 196).
Aa
Black text reads best on this color (5.91:1).
About this color
#538CC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.104 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 5.91:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.91:1 |
| White text | 3.54:1 |
Values
| HEX | #538CC4 |
| RGB | rgb(83, 140, 196) |
| HSL | hsl(210, 49%, 55%) |
| OKLCH | oklch(62.5% 0.104 249.4) |
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 #538CC4 | 3.54:1 | AA large text | Lc -68.4 | Content text, not long reading |
| Black text on #538CC4 | 5.91:1 | AA | Lc 41.2 | Non-text elements, placeholder text |
| #538CC4 text on white | 3.54:1 | AA large text | Lc 62.9 | Content text, not long reading |
| #538CC4 text on black | 5.91:1 | AA | Lc -38.8 | 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
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A8C4E1
oklch(80.9% 0.051 249.4)
-
Step 400
400
#79A5D2
oklch(70.7% 0.082 249.6)
-
Step 500
500 (this color)
#538CC4
oklch(62.5% 0.104 249.4)
-
Step 600
600
#3877B3
oklch(55.6% 0.114 249.6)
-
Step 700
700
#2A649A
oklch(49.2% 0.106 249.5)
-
Step 800
800
#24527D
oklch(42.8% 0.088 249.2)
-
Step 900
900
#234464
oklch(37.7% 0.068 249.4)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#538CC4 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) | #748EC6 | 0.038 |
| Deuteranopia (no green cones) | #6683C3 | 0.030 |
| Tritanopia (no blue cones) | #0099A0 | 0.087 |
| Achromatopsia (no color) | #888888 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538CC4
#538CC4
oklch(62.5% 0.104 249.4)
- #B07B3B
#B07B3B
oklch(62.4% 0.104 68.9)
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 #538CC4, 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 0.029
- Dusty Blue #5A86AD ΔE 0.035
- Off Blue #5684AE ΔE 0.036
- Steel Blue #4682B4 ΔE 0.038
- Water Blue #0E87CC ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.048
- Blue NCS #118AB2 ΔE 0.052
Use #538CC4 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.