#737F99
Closest named color: Lavender Gray (#7E7F9A). oklch(59.6% 0.042 265.6), rgb(115, 127, 153).
Aa
Black text reads best on this color (5.22:1).
About this color
#737F99 is a medium-dark, muted blue. In OKLCH its lightness is 60%, its chroma 0.042 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Lavender Gray (#7E7F9A), ΔE 0.016 away. Black text reads best on it, at 5.22:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Lavender Gray (#7E7F9A) |
| Black text | 5.22:1 |
| White text | 4.01:1 |
Values
| HEX | #737F99 |
| RGB | rgb(115, 127, 153) |
| HSL | hsl(221, 16%, 53%) |
| OKLCH | oklch(59.6% 0.042 265.6) |
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 #737F99 | 4.01:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #737F99 | 5.22:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #737F99 text on white | 4.01:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #737F99 text on black | 5.22:1 | AA | Lc -34.2 | 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 500.
-
Step 50
50
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E1
oklch(88.5% 0.012 264.5)
-
Step 300
300
#BAC1CE
oklch(80.9% 0.02 263)
-
Step 400
400
#97A1B6
oklch(70.8% 0.033 265.2)
-
Step 500
500 (this color)
#737F99
oklch(59.6% 0.042 265.6)
-
Step 600
600
#66738F
oklch(55.5% 0.046 265.4)
-
Step 700
700
#55617A
oklch(49.2% 0.043 264.8)
-
Step 800
800
#464F63
oklch(42.8% 0.035 265.9)
-
Step 900
900
#3B4251
oklch(37.9% 0.027 265.4)
-
Step 950
950
#22262F
oklch(26.9% 0.018 266.3)
#737F99 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) | #77819A | 0.008 |
| Deuteranopia (no green cones) | #737D98 | 0.006 |
| Tritanopia (no blue cones) | #698488 | 0.037 |
| Achromatopsia (no color) | #7F7F7F | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737F99
#737F99
oklch(59.6% 0.042 265.6)
- #8A7E62
#8A7E62
oklch(59.6% 0.043 87.5)
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 #737F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lavender Gray #7E7F9A ΔE 0.016
- Slate Gray #708090 ΔE 0.016
- Steel #738595 ΔE 0.020
- Light Slate Gray #778899 ΔE 0.027
- Grey Blue #647D8E ΔE 0.028
- Steel Grey #6F828A ΔE 0.028
- Battleship Grey #6B7C85 ΔE 0.033
- Blue Grey #758DA3 ΔE 0.039
Use #737F99 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.