#537FA1
Closest named color: Stormy Blue (#507B9C). oklch(57.8% 0.072 242.7), rgb(83, 127, 161).
Aa
Black text reads best on this color (4.91:1).
About this color
#537FA1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.072 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.013 away. Black text reads best on it, at 4.91:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.91:1 |
| White text | 4.26:1 |
Values
| HEX | #537FA1 |
| RGB | rgb(83, 127, 161) |
| HSL | hsl(206, 32%, 48%) |
| OKLCH | oklch(57.8% 0.072 242.7) |
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 #537FA1 | 4.26:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #537FA1 | 4.91:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #537FA1 text on white | 4.26:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #537FA1 text on black | 4.91:1 | AA | Lc -32.2 | 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 600.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AFC4D4
oklch(81% 0.032 240.7)
-
Step 400
400
#85A5BF
oklch(70.7% 0.052 243)
-
Step 500
500
#668FAE
oklch(63.2% 0.065 241.7)
-
Step 600
600 (this color)
#537FA1
oklch(57.8% 0.072 242.7)
-
Step 700
700
#3D6584
oklch(49.1% 0.067 243.1)
-
Step 800
800
#33536B
oklch(42.8% 0.055 242.1)
-
Step 900
900
#2D4457
oklch(37.6% 0.044 244.2)
-
Step 950
950
#1B2833
oklch(27% 0.027 244.6)
#537FA1 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) | #707FA3 | 0.036 |
| Deuteranopia (no green cones) | #6677A0 | 0.030 |
| Tritanopia (no blue cones) | #2F878A | 0.059 |
| Achromatopsia (no color) | #7A7A7A | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537FA1
#537FA1
oklch(57.8% 0.072 242.7)
- #98704C
#98704C
oklch(57.7% 0.072 62.6)
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 #537FA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.013
- Cerulean #457B9D ΔE 0.021
- Off Blue #5684AE ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.027
- Steel Blue #4682B4 ΔE 0.030
- Dull Blue #49759C ΔE 0.032
- Grey Blue #647D8E ΔE 0.033
- Cool Blue #4984B8 ΔE 0.035
Use #537FA1 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.