#737B8B
Closest named color: Slate Gray (#708090). oklch(58.2% 0.026 264.3), rgb(115, 123, 139).
Aa
Black text reads best on this color (4.93:1).
About this color
#737B8B is a medium-dark close to neutral grey. In OKLCH its lightness is 58%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Slate Gray (#708090), ΔE 0.014 away. Black text reads best on it, at 4.93:1.
| Hue family | Neutrals |
| Lightness | medium-dark (58%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Slate Gray (#708090) |
| Black text | 4.93:1 |
| White text | 4.25:1 |
Values
| HEX | #737B8B |
| RGB | rgb(115, 123, 139) |
| HSL | hsl(220, 9%, 50%) |
| OKLCH | oklch(58.2% 0.026 264.3) |
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 #737B8B | 4.25:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #737B8B | 4.93:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #737B8B text on white | 4.25:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #737B8B text on black | 4.93:1 | 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E9EAEC
oklch(93.7% 0.003 264.5)
-
Step 200
200
#D7D9DE
oklch(88.5% 0.007 268.5)
-
Step 300
300
#BDC1C8
oklch(81% 0.011 261.8)
-
Step 400
400
#9BA1AD
oklch(70.8% 0.019 264.4)
-
Step 500
500
#828A99
oklch(63.2% 0.024 263.1)
-
Step 600
600 (this color)
#737B8B
oklch(58.2% 0.026 264.3)
-
Step 700
700
#5A616F
oklch(49.2% 0.024 264.3)
-
Step 800
800
#494F5A
oklch(42.6% 0.02 262.6)
-
Step 900
900
#3D424A
oklch(37.7% 0.015 259.8)
-
Step 950
950
#24262B
oklch(26.9% 0.01 268.3)
#737B8B 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) | #767C8C | 0.006 |
| Deuteranopia (no green cones) | #747A8B | 0.003 |
| Tritanopia (no blue cones) | #6D7E80 | 0.024 |
| Achromatopsia (no color) | #7B7B7B | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737B8B
#737B8B
oklch(58.2% 0.026 264.3)
- #827A69
#827A69
oklch(58.2% 0.027 85.8)
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 #737B8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Gray #708090 ΔE 0.014
- Battleship Grey #6B7C85 ΔE 0.016
- Grey Blue #647D8E ΔE 0.020
- Steel Grey #6F828A ΔE 0.021
- Battleship Gray #6C757D ΔE 0.027
- Steel #738595 ΔE 0.028
- Lavender Gray #7E7F9A ΔE 0.030
- Gray #808080 ΔE 0.032
Use #737B8B 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.