#538BC5
Closest named color: Faded Blue (#658CBB). oklch(62.3% 0.106 250.7), rgb(83, 139, 197).
Aa
Black text reads best on this color (5.86:1).
About this color
#538BC5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.106 and its hue 251°. 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 5.86:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.86:1 |
| White text | 3.57:1 |
Values
| HEX | #538BC5 |
| RGB | rgb(83, 139, 197) |
| HSL | hsl(211, 50%, 55%) |
| OKLCH | oklch(62.3% 0.106 250.7) |
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 #538BC5 | 3.57:1 | AA large text | Lc -68.7 | Content text, not long reading |
| Black text on #538BC5 | 5.86:1 | AA | Lc 40.9 | Non-text elements, placeholder text |
| #538BC5 text on white | 3.57:1 | AA large text | Lc 63.2 | Content text, not long reading |
| #538BC5 text on black | 5.86:1 | AA | Lc -38.5 | 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
#A8C4E2
oklch(81% 0.052 250.3)
-
Step 400
400
#79A5D3
oklch(70.8% 0.083 250.2)
-
Step 500
500 (this color)
#538BC5
oklch(62.3% 0.106 250.7)
-
Step 600
600
#3977B4
oklch(55.7% 0.115 250.3)
-
Step 700
700
#2B639B
oklch(49% 0.108 251)
-
Step 800
800
#25517E
oklch(42.7% 0.09 251.2)
-
Step 900
900
#234465
oklch(37.8% 0.069 250.1)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#538BC5 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) | #738DC8 | 0.038 |
| Deuteranopia (no green cones) | #6482C4 | 0.029 |
| Tritanopia (no blue cones) | #00989F | 0.090 |
| Achromatopsia (no color) | #878787 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538BC5
#538BC5
oklch(62.3% 0.106 250.7)
- #AF7B37
#AF7B37
oklch(62.3% 0.106 70.8)
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 #538BC5, 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 0.028
- Dusty Blue #5A86AD ΔE 0.036
- Off Blue #5684AE ΔE 0.036
- Steel Blue #4682B4 ΔE 0.037
- Water Blue #0E87CC ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.047
- Blue NCS #118AB2 ΔE 0.053
Use #538BC5 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.