#337B74
Closest named color: Bluegreen (#017A79). oklch(53.5% 0.072 186.6), rgb(51, 123, 116).
Aa
White text reads best on this color (4.96:1).
About this color
#337B74 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.072 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.023 away. White text reads best on it, at 4.96:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.22:1 |
| White text | 4.96:1 |
Values
| HEX | #337B74 |
| RGB | rgb(51, 123, 116) |
| HSL | hsl(174, 41%, 34%) |
| OKLCH | oklch(53.5% 0.072 186.6) |
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 #337B74 | 4.96:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #337B74 | 4.22:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #337B74 text on white | 4.96:1 | AA | Lc 74.2 | Content text, not long reading |
| #337B74 text on black | 4.22:1 | AA large text | Lc -27.5 | 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 600.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CDDDDB
oklch(88.5% 0.017 187.8)
-
Step 300
300
#AAC8C4
oklch(80.9% 0.033 186.7)
-
Step 400
400
#7BACA6
oklch(70.8% 0.053 186.6)
-
Step 500
500
#579790
oklch(63.1% 0.067 186.6)
-
Step 600
600 (this color)
#337B74
oklch(53.5% 0.072 186.6)
-
Step 700
700
#2B6D67
oklch(49.1% 0.067 187)
-
Step 800
800
#255954
oklch(42.7% 0.056 186.8)
-
Step 900
900
#244945
oklch(37.7% 0.043 186.5)
-
Step 950
950
#162B29
oklch(27.1% 0.027 187.9)
#337B74 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) | #757574 | 0.077 |
| Deuteranopia (no green cones) | #6A6C75 | 0.074 |
| Tritanopia (no blue cones) | #007E79 | 0.021 |
| Achromatopsia (no color) | #707070 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337B74
#337B74
oklch(53.5% 0.072 186.6)
- #925B66
#925B66
oklch(53.5% 0.074 6.8)
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 #337B74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.023
- Teal #008080 ΔE 0.025
- Deep Aqua #08787F ΔE 0.029
- Dark Aquamarine #017371 ΔE 0.037
- Deep Turquoise #017374 ΔE 0.037
- Ocean #017B92 ΔE 0.050
- Dark Cyan #008B8B ΔE 0.050
- Metallic Blue #4F738E ΔE 0.062
Use #337B74 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.