#737FA3
Closest named color: Lavender Gray (#7E7F9A). oklch(60% 0.057 270.3), rgb(115, 127, 163).
Aa
Black text reads best on this color (5.29:1).
About this color
#737FA3 is a medium-dark, muted blue. In OKLCH its lightness is 60%, its chroma 0.057 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Lavender Gray (#7E7F9A), ΔE 0.020 away. Black text reads best on it, at 5.29:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Lavender Gray (#7E7F9A) |
| Black text | 5.29:1 |
| White text | 3.96:1 |
Values
| HEX | #737FA3 |
| RGB | rgb(115, 127, 163) |
| HSL | hsl(225, 21%, 55%) |
| OKLCH | oklch(60% 0.057 270.3) |
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 #737FA3 | 3.96:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #737FA3 | 5.29:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #737FA3 text on white | 3.96:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #737FA3 text on black | 5.29:1 | AA | Lc -34.6 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D5D9E4
oklch(88.5% 0.016 270)
-
Step 300
300
#B9C0D3
oklch(80.8% 0.028 269.6)
-
Step 400
400
#96A0BD
oklch(70.8% 0.044 270.3)
-
Step 500
500 (this color)
#737FA3
oklch(60% 0.057 270.3)
-
Step 600
600
#657298
oklch(55.6% 0.061 269.7)
-
Step 700
700
#545F82
oklch(49.1% 0.058 270.7)
-
Step 800
800
#454E6A
oklch(42.8% 0.048 270.5)
-
Step 900
900
#3A4156
oklch(37.8% 0.037 270.2)
-
Step 950
950
#222632
oklch(27% 0.023 270.4)
#737FA3 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) | #7482A5 | 0.009 |
| Deuteranopia (no green cones) | #707EA2 | 0.005 |
| Tritanopia (no blue cones) | #66868B | 0.051 |
| Achromatopsia (no color) | #808080 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737FA3
#737FA3
oklch(60% 0.057 270.3)
- #8D7F59
#8D7F59
oklch(60% 0.056 90.2)
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 #737FA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lavender Gray #7E7F9A ΔE 0.020
- Slate Gray #708090 ΔE 0.031
- Steel #738595 ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.034
- Light Slate Gray #778899 ΔE 0.035
- Off Blue #5684AE ΔE 0.037
- Silver Lake Blue #778DA9 ΔE 0.040
- Grey Blue #647D8E ΔE 0.040
Use #737FA3 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.