#538CA4
Closest named color: Dusty Blue (#5A86AD). oklch(61% 0.07 227), rgb(83, 140, 164).
Aa
Black text reads best on this color (5.65:1).
About this color
#538CA4 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 61%, its chroma 0.070 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.026 away. Black text reads best on it, at 5.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.65:1 |
| White text | 3.71:1 |
Values
| HEX | #538CA4 |
| RGB | rgb(83, 140, 164) |
| HSL | hsl(198, 33%, 48%) |
| OKLCH | oklch(61% 0.07 227) |
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 #538CA4 | 3.71:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #538CA4 | 5.65:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #538CA4 text on white | 3.71:1 | AA large text | Lc 64.6 | Content text, not long reading |
| #538CA4 text on black | 5.65:1 | AA | Lc -37.1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#AAC6D2
oklch(81% 0.035 225.6)
-
Step 400
400
#7CA8BB
oklch(70.7% 0.055 226.4)
-
Step 500
500 (this color)
#538CA4
oklch(61% 0.07 227)
-
Step 600
600
#3D7C96
oklch(55.5% 0.076 227.5)
-
Step 700
700
#2E6980
oklch(49.2% 0.071 226.6)
-
Step 800
800
#285568
oklch(42.6% 0.059 228.1)
-
Step 900
900
#254754
oklch(37.8% 0.045 224.9)
-
Step 950
950
#162931
oklch(26.8% 0.029 226.7)
#538CA4 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) | #7F8AA5 | 0.053 |
| Deuteranopia (no green cones) | #7381A4 | 0.046 |
| Tritanopia (no blue cones) | #299394 | 0.049 |
| Achromatopsia (no color) | #858585 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538CA4
#538CA4
oklch(61% 0.07 227)
- #A7765F
#A7765F
oklch(61% 0.071 46.1)
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 #538CA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.026
- Off Blue #5684AE ΔE 0.032
- Blue Grey #758DA3 ΔE 0.039
- Steel #738595 ΔE 0.041
- Light Slate Gray #778899 ΔE 0.042
- Faded Blue #658CBB ΔE 0.043
- Silver Lake Blue #778DA9 ΔE 0.044
- Cool Blue #4984B8 ΔE 0.045
Use #538CA4 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.