#37645E
Closest named color: Dark Green Blue (#1F6357). oklch(46.9% 0.051 184.7), rgb(55, 100, 94).
Aa
White text reads best on this color (6.67:1).
About this color
#37645E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.051 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.025 away. White text reads best on it, at 6.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #37645E |
| RGB | rgb(55, 100, 94) |
| HSL | hsl(172, 29%, 30%) |
| OKLCH | oklch(46.9% 0.051 184.7) |
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 #37645E | 6.67:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #37645E | 3.14:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #37645E text on white | 6.67:1 | AA | Lc 82.9 | Fine for body text |
| #37645E text on black | 3.14:1 | AA large text | Lc -19.1 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEA
oklch(93.5% 0.007 185.3)
-
Step 200
200
#D0DCDA
oklch(88.5% 0.013 185.1)
-
Step 300
300
#B0C6C2
oklch(80.9% 0.025 183.6)
-
Step 400
400
#86A9A4
oklch(70.7% 0.039 185.6)
-
Step 500
500
#66948D
oklch(63.1% 0.051 184.2)
-
Step 600
600
#4D7E77
oklch(55.6% 0.054 184.3)
-
Step 700
700 (this color)
#37645E
oklch(46.9% 0.051 184.7)
-
Step 800
800
#335752
oklch(42.8% 0.043 184.6)
-
Step 900
900
#2D4744
oklch(37.6% 0.032 186.8)
-
Step 950
950
#1B2A28
oklch(27.1% 0.021 185.7)
#37645E 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) | #605F5E | 0.055 |
| Deuteranopia (no green cones) | #585A5F | 0.051 |
| Tritanopia (no blue cones) | #256662 | 0.015 |
| Achromatopsia (no color) | #5C5C5C | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37645E
#37645E
oklch(46.9% 0.051 184.7)
- #734F57
#734F57
oklch(46.9% 0.05 4.5)
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 #37645E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.025
- Dark Aqua #05696B ΔE 0.032
- Petrol #005F6A ΔE 0.044
- Slate #516572 ΔE 0.048
- Dark Aquamarine #017371 ΔE 0.049
- Deep Turquoise #017374 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.061
- Deep Teal #00555A ΔE 0.065
Use #37645E 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.