#737F90
Closest named color: Slate Gray (#708090). oklch(59.3% 0.03 257.1), rgb(115, 127, 144).
Aa
Black text reads best on this color (5.16:1).
About this color
#737F90 is a medium-dark close to neutral grey. In OKLCH its lightness is 59%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Slate Gray (#708090), ΔE 0.005 away. Black text reads best on it, at 5.16:1.
| Hue family | Neutrals |
| Lightness | medium-dark (59%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Slate Gray (#708090) |
| Black text | 5.16:1 |
| White text | 4.06:1 |
Values
| HEX | #737F90 |
| RGB | rgb(115, 127, 144) |
| HSL | hsl(215, 12%, 51%) |
| OKLCH | oklch(59.3% 0.03 257.1) |
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 #737F90 | 4.06:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #737F90 | 5.16:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #737F90 text on white | 4.06:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #737F90 text on black | 5.16:1 | AA | Lc -33.8 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
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
#BBC1C9
oklch(80.9% 0.013 255.5)
-
Step 400
400
#98A1AE
oklch(70.6% 0.022 257.5)
-
Step 500
500
#7F8A9A
oklch(63% 0.027 257.7)
-
Step 600
600 (this color)
#737F90
oklch(59.3% 0.03 257.1)
-
Step 700
700
#576271
oklch(49.2% 0.028 256.2)
-
Step 800
800
#47505C
oklch(42.8% 0.023 255.6)
-
Step 900
900
#3C424B
oklch(37.7% 0.017 258.4)
-
Step 950
950
#23272C
oklch(27.1% 0.011 254)
#737F90 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) | #798091 | 0.009 |
| Deuteranopia (no green cones) | #767D90 | 0.007 |
| Tritanopia (no blue cones) | #6C8384 | 0.027 |
| Achromatopsia (no color) | #7E7E7E | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737F90
#737F90
oklch(59.3% 0.03 257.1)
- #887C6B
#887C6B
oklch(59.2% 0.029 76.6)
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 #737F90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Gray #708090 ΔE 0.005
- Steel Grey #6F828A ΔE 0.016
- Steel #738595 ΔE 0.017
- Battleship Grey #6B7C85 ΔE 0.022
- Grey Blue #647D8E ΔE 0.022
- Lavender Gray #7E7F9A ΔE 0.023
- Light Slate Gray #778899 ΔE 0.027
- Gray #808080 ΔE 0.031
Use #737F90 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.