#37584F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.2% 0.042 175.2), rgb(55, 88, 79).
Aa
White text reads best on this color (7.86:1).
About this color
#37584F is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.042 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.032 away. White text reads best on it, at 7.86:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.67:1 |
| White text | 7.86:1 |
Values
| HEX | #37584F |
| RGB | rgb(55, 88, 79) |
| HSL | hsl(164, 23%, 28%) |
| OKLCH | oklch(43.2% 0.042 175.2) |
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 #37584F | 7.86:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #37584F | 2.67:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #37584F text on white | 7.86:1 | AAA | Lc 87.2 | Fine for body text |
| #37584F text on black | 2.67:1 | Fails | Lc -14.9 | Not readable |
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 800.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5EBE9
oklch(93.5% 0.007 174.4)
-
Step 200
200
#D0DCD8
oklch(88.4% 0.014 174.1)
-
Step 300
300
#B1C6C0
oklch(80.9% 0.024 176.7)
-
Step 400
400
#88A99F
oklch(70.7% 0.039 174.7)
-
Step 500
500
#699488
oklch(63.2% 0.05 175.4)
-
Step 600
600
#507E72
oklch(55.6% 0.054 175.9)
-
Step 700
700
#416A5F
oklch(49% 0.05 175.3)
-
Step 800
800 (this color)
#37584F
oklch(43.2% 0.042 175.2)
-
Step 900
900
#2F4741
oklch(37.6% 0.031 177.2)
-
Step 950
950
#1C2A26
oklch(27.1% 0.02 175.1)
#37584F 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) | #56544F | 0.044 |
| Deuteranopia (no green cones) | #505050 | 0.042 |
| Tritanopia (no blue cones) | #2D5955 | 0.013 |
| Achromatopsia (no color) | #525252 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37584F
#37584F
oklch(43.2% 0.042 175.2)
- #634751
#634751
oklch(43.2% 0.041 355.7)
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 #37584F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.032
- Dark Green Blue #1F6357 ΔE 0.036
- Deep Teal #00555A ΔE 0.044
- Dark Blue Green #005249 ΔE 0.048
- Petrol #005F6A ΔE 0.049
- Pine #2B5D34 ΔE 0.053
- Dark Teal #014D4E ΔE 0.059
- Dark Aqua #05696B ΔE 0.060
Use #37584F 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.