#538EBB
Closest named color: Faded Blue (#658CBB). oklch(62.5% 0.092 243), rgb(83, 142, 187).
Aa
Black text reads best on this color (5.95:1).
About this color
#538EBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.092 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.019 away. Black text reads best on it, at 5.95:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.95:1 |
| White text | 3.52:1 |
Values
| HEX | #538EBB |
| RGB | rgb(83, 142, 187) |
| HSL | hsl(206, 43%, 53%) |
| OKLCH | oklch(62.5% 0.092 243) |
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 #538EBB | 3.52:1 | AA large text | Lc -68.2 | Content text, not long reading |
| Black text on #538EBB | 5.95:1 | AA | Lc 41.4 | Non-text elements, placeholder text |
| #538EBB text on white | 3.52:1 | AA large text | Lc 62.7 | Content text, not long reading |
| #538EBB text on black | 5.95:1 | AA | Lc -39.0 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDCE9
oklch(88.6% 0.025 242.4)
-
Step 300
300
#A8C5DC
oklch(80.9% 0.045 242.1)
-
Step 400
400
#79A6CA
oklch(70.6% 0.072 243.1)
-
Step 500
500 (this color)
#538EBB
oklch(62.5% 0.092 243)
-
Step 600
600
#3779A9
oklch(55.5% 0.1 243.1)
-
Step 700
700
#296691
oklch(49.1% 0.093 242.8)
-
Step 800
800
#245376
oklch(42.7% 0.078 243.6)
-
Step 900
900
#23455F
oklch(37.7% 0.06 243.4)
-
Step 950
950
#152938
oklch(27.2% 0.038 242.4)
#538EBB 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) | #7A8EBD | 0.045 |
| Deuteranopia (no green cones) | #6C84BA | 0.036 |
| Tritanopia (no blue cones) | #00999D | 0.077 |
| Achromatopsia (no color) | #888888 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538EBB
#538EBB
oklch(62.5% 0.092 243)
- #AF7B4A
#AF7B4A
oklch(62.5% 0.092 63.1)
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 #538EBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.019
- Dusty Blue #5A86AD ΔE 0.027
- Off Blue #5684AE ΔE 0.030
- Cool Blue #4984B8 ΔE 0.031
- Steel Blue #4682B4 ΔE 0.038
- Silver Lake Blue #778DA9 ΔE 0.046
- Blue NCS #118AB2 ΔE 0.047
- Blue Grey #758DA3 ΔE 0.050
Use #538EBB 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.