#737D8D
Closest named color: Slate Gray (#708090). oklch(58.7% 0.027 259.8), rgb(115, 125, 141).
Aa
Black text reads best on this color (5.04:1).
About this color
#737D8D is a medium-dark close to neutral grey. In OKLCH its lightness is 59%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Slate Gray (#708090), ΔE 0.009 away. Black text reads best on it, at 5.04:1.
| Hue family | Neutrals |
| Lightness | medium-dark (59%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Slate Gray (#708090) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #737D8D |
| RGB | rgb(115, 125, 141) |
| HSL | hsl(217, 10%, 50%) |
| OKLCH | oklch(58.7% 0.027 259.8) |
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 #737D8D | 4.16:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #737D8D | 5.04:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #737D8D text on white | 4.16:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #737D8D text on black | 5.04:1 | AA | Lc -33.0 | 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
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D6D9DE
oklch(88.4% 0.008 260.7)
-
Step 300
300
#BCC1C9
oklch(80.9% 0.013 259.8)
-
Step 400
400
#9AA1AD
oklch(70.7% 0.019 261.3)
-
Step 500
500
#818A99
oklch(63.1% 0.025 260.7)
-
Step 600
600 (this color)
#737D8D
oklch(58.7% 0.027 259.8)
-
Step 700
700
#58616F
oklch(49% 0.025 259.2)
-
Step 800
800
#484F5B
oklch(42.6% 0.022 261.3)
-
Step 900
900
#3D424A
oklch(37.7% 0.015 259.8)
-
Step 950
950
#23272C
oklch(27.1% 0.011 254)
#737D8D 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) | #787E8E | 0.008 |
| Deuteranopia (no green cones) | #757B8D | 0.006 |
| Tritanopia (no blue cones) | #6D8082 | 0.024 |
| Achromatopsia (no color) | #7C7C7C | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737D8D
#737D8D
oklch(58.7% 0.027 259.8)
- #857B6A
#857B6A
oklch(58.7% 0.028 81)
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 #737D8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Gray #708090 ΔE 0.009
- Steel Grey #6F828A ΔE 0.017
- Battleship Grey #6B7C85 ΔE 0.017
- Grey Blue #647D8E ΔE 0.020
- Steel #738595 ΔE 0.023
- Lavender Gray #7E7F9A ΔE 0.027
- Gray #808080 ΔE 0.030
- Medium Grey #7D7F7C ΔE 0.031
Use #737D8D 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.