#737D88
Closest named color: Slate Gray (#708090). oklch(58.5% 0.021 250.7), rgb(115, 125, 136).
Aa
Black text reads best on this color (5.01:1).
About this color
#737D88 is a medium-dark close to neutral grey. In OKLCH its lightness is 59%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Slate Gray (#708090), ΔE 0.013 away. Black text reads best on it, at 5.01:1.
| Hue family | Neutrals |
| Lightness | medium-dark (59%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Slate Gray (#708090) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #737D88 |
| RGB | rgb(115, 125, 136) |
| HSL | hsl(211, 8%, 49%) |
| OKLCH | oklch(58.5% 0.021 250.7) |
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 #737D88 | 4.18:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #737D88 | 5.01:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #737D88 text on white | 4.18:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #737D88 text on black | 5.01:1 | AA | Lc -32.8 | 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
#E8EAEB
oklch(93.6% 0.003 228.8)
-
Step 200
200
#D7D9DC
oklch(88.5% 0.005 258.3)
-
Step 300
300
#BCC1C6
oklch(80.8% 0.009 247.9)
-
Step 400
400
#9AA1AA
oklch(70.6% 0.015 254.6)
-
Step 500
500
#818B95
oklch(63.2% 0.019 248.1)
-
Step 600
600 (this color)
#737D88
oklch(58.5% 0.021 250.7)
-
Step 700
700
#59626C
oklch(49.2% 0.02 251)
-
Step 800
800
#495058
oklch(42.8% 0.016 251.7)
-
Step 900
900
#3D4248
oklch(37.7% 0.012 253)
-
Step 950
950
#24272A
oklch(27.1% 0.007 248.1)
#737D88 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) | #797D89 | 0.009 |
| Deuteranopia (no green cones) | #777B88 | 0.008 |
| Tritanopia (no blue cones) | #6E7F80 | 0.017 |
| Achromatopsia (no color) | #7C7C7C | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737D88
#737D88
oklch(58.5% 0.021 250.7)
- #847A6F
#847A6F
oklch(58.5% 0.021 70.1)
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 #737D88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Gray #708090 ΔE 0.013
- Battleship Grey #6B7C85 ΔE 0.013
- Steel Grey #6F828A ΔE 0.014
- Grey Blue #647D8E ΔE 0.021
- Medium Grey #7D7F7C ΔE 0.025
- Gray #808080 ΔE 0.025
- Steel #738595 ΔE 0.026
- Battleship Gray #6C757D ΔE 0.028
Use #737D88 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.