#538AB1
Closest named color: Dusty Blue (#5A86AD). oklch(61.1% 0.083 240.9), rgb(83, 138, 177).
Aa
Black text reads best on this color (5.63:1).
About this color
#538AB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.083 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.012 away. Black text reads best on it, at 5.63:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.63:1 |
| White text | 3.72:1 |
Values
| HEX | #538AB1 |
| RGB | rgb(83, 138, 177) |
| HSL | hsl(205, 38%, 51%) |
| OKLCH | oklch(61.1% 0.083 240.9) |
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 #538AB1 | 3.72:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #538AB1 | 5.63:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #538AB1 text on white | 3.72:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #538AB1 text on black | 5.63:1 | AA | Lc -37.0 | 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
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDBE7
oklch(88.4% 0.023 241.9)
-
Step 300
300
#AAC5D9
oklch(81% 0.041 240.1)
-
Step 400
400
#7CA6C6
oklch(70.6% 0.065 241.7)
-
Step 500
500 (this color)
#538AB1
oklch(61.1% 0.083 240.9)
-
Step 600
600
#3D7AA3
oklch(55.7% 0.09 240.4)
-
Step 700
700
#2E668C
oklch(49% 0.085 241.2)
-
Step 800
800
#285472
oklch(42.9% 0.07 240.8)
-
Step 900
900
#25455C
oklch(37.7% 0.055 241.5)
-
Step 950
950
#162936
oklch(27.1% 0.035 239.7)
#538AB1 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) | #798AB3 | 0.045 |
| Deuteranopia (no green cones) | #6C80B0 | 0.037 |
| Tritanopia (no blue cones) | #1A9497 | 0.069 |
| Achromatopsia (no color) | #848484 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538AB1
#538AB1
oklch(61.1% 0.083 240.9)
- #A8784E
#A8784E
oklch(61.2% 0.083 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 #538AB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.012
- Off Blue #5684AE ΔE 0.017
- Cool Blue #4984B8 ΔE 0.025
- Faded Blue #658CBB ΔE 0.026
- Steel Blue #4682B4 ΔE 0.029
- Blue NCS #118AB2 ΔE 0.041
- Silver Lake Blue #778DA9 ΔE 0.045
- Blue Grey #758DA3 ΔE 0.046
Use #538AB1 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.