#537F99
Closest named color: Stormy Blue (#507B9C). oklch(57.5% 0.063 235.3), rgb(83, 127, 153).
Aa
Black text reads best on this color (4.86:1).
About this color
#537F99 is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.063 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.015 away. Black text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #537F99 |
| RGB | rgb(83, 127, 153) |
| HSL | hsl(202, 30%, 46%) |
| OKLCH | oklch(57.5% 0.063 235.3) |
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 #537F99 | 4.31:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #537F99 | 4.86:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #537F99 text on white | 4.31:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #537F99 text on black | 4.86:1 | AA | Lc -31.9 | 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
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B0C4D1
oklch(80.9% 0.029 236.3)
-
Step 400
400
#86A6B9
oklch(70.8% 0.045 234.3)
-
Step 500
500
#678FA8
oklch(63% 0.058 236.3)
-
Step 600
600 (this color)
#537F99
oklch(57.5% 0.063 235.3)
-
Step 700
700
#3E667D
oklch(49% 0.058 234.9)
-
Step 800
800
#345366
oklch(42.6% 0.048 236.4)
-
Step 900
900
#2D4553
oklch(37.7% 0.038 234.8)
-
Step 950
950
#1B2831
oklch(26.9% 0.025 239.1)
#537F99 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) | #737E9A | 0.040 |
| Deuteranopia (no green cones) | #697699 | 0.035 |
| Tritanopia (no blue cones) | #358687 | 0.049 |
| Achromatopsia (no color) | #7A7A7A | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #537F99
#537F99
oklch(57.5% 0.063 235.3)
- #966F55
#966F55
oklch(57.4% 0.062 54.8)
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 #537F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.015
- Cerulean #457B9D ΔE 0.022
- Grey Blue #647D8E ΔE 0.024
- Off Blue #5684AE ΔE 0.033
- Dull Blue #49759C ΔE 0.035
- Dusty Blue #5A86AD ΔE 0.035
- Metallic Blue #4F738E ΔE 0.036
- Slate Gray #708090 ΔE 0.038
Use #537F99 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.