#538FBB
Closest named color: Faded Blue (#658CBB). oklch(62.7% 0.091 242), rgb(83, 143, 187).
Aa
Black text reads best on this color (6.01:1).
About this color
#538FBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.091 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.020 away. Black text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.01:1 |
| White text | 3.49:1 |
Values
| HEX | #538FBB |
| RGB | rgb(83, 143, 187) |
| HSL | hsl(205, 43%, 53%) |
| OKLCH | oklch(62.7% 0.091 242) |
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 #538FBB | 3.49:1 | AA large text | Lc -67.8 | Content text, not long reading |
| Black text on #538FBB | 6.01:1 | AA | Lc 41.7 | Non-text elements, placeholder text |
| #538FBB text on white | 3.49:1 | AA large text | Lc 62.3 | Content text, not long reading |
| #538FBB text on black | 6.01:1 | AA | Lc -39.4 | 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
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A8C5DC
oklch(80.9% 0.045 242.1)
-
Step 400
400
#79A7CA
oklch(70.8% 0.071 241.8)
-
Step 500
500 (this color)
#538FBB
oklch(62.7% 0.091 242)
-
Step 600
600
#377AA8
oklch(55.7% 0.099 241.6)
-
Step 700
700
#286690
oklch(49% 0.092 241.9)
-
Step 800
800
#235475
oklch(42.8% 0.076 241.2)
-
Step 900
900
#22455F
oklch(37.7% 0.06 242.8)
-
Step 950
950
#152937
oklch(27.1% 0.037 240.5)
#538FBB 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) | #7C8FBD | 0.047 |
| Deuteranopia (no green cones) | #6E84BA | 0.040 |
| Tritanopia (no blue cones) | #009A9E | 0.075 |
| Achromatopsia (no color) | #898989 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538FBB
#538FBB
oklch(62.7% 0.091 242)
- #B07B4C
#B07B4C
oklch(62.6% 0.091 61.5)
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 #538FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.020
- Dusty Blue #5A86AD ΔE 0.028
- Off Blue #5684AE ΔE 0.032
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.041
- Silver Lake Blue #778DA9 ΔE 0.046
- Blue NCS #118AB2 ΔE 0.048
- Blue Grey #758DA3 ΔE 0.049
Use #538FBB 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.