#237B64
Closest named color: Bluegreen (#017A79). oklch(52.5% 0.09 171.6), rgb(35, 123, 100).
Aa
White text reads best on this color (5.13:1).
About this color
#237B64 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.090 and its hue 172°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.034 away. White text reads best on it, at 5.13:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.08:1 |
| White text | 5.13:1 |
Values
| HEX | #237B64 |
| RGB | rgb(35, 123, 100) |
| HSL | hsl(164, 56%, 31%) |
| OKLCH | oklch(52.5% 0.09 171.6) |
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 #237B64 | 5.13:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #237B64 | 4.08:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #237B64 text on white | 5.13:1 | AA | Lc 75.1 | Fine for body text |
| #237B64 text on black | 4.08:1 | AA large text | Lc -26.6 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CBDED7
oklch(88.4% 0.022 171.7)
-
Step 300
300
#A7CABD
oklch(81% 0.042 170.7)
-
Step 400
400
#76AE9C
oklch(70.7% 0.065 172.3)
-
Step 500
500
#509A83
oklch(63.2% 0.083 171.1)
-
Step 600
600 (this color)
#237B64
oklch(52.5% 0.09 171.6)
-
Step 700
700
#20705B
oklch(49.2% 0.083 171.6)
-
Step 800
800
#1D5B4A
oklch(42.6% 0.069 171.5)
-
Step 900
900
#1F4B3E
oklch(37.7% 0.054 171.4)
-
Step 950
950
#132C24
oklch(27% 0.035 170.7)
#237B64 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) | #777363 | 0.092 |
| Deuteranopia (no green cones) | #6B6A66 | 0.089 |
| Tritanopia (no blue cones) | #007C74 | 0.025 |
| Achromatopsia (no color) | #6E6E6E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237B64
#237B64
oklch(52.5% 0.09 171.6)
- #925470
#925470
oklch(52.6% 0.09 352.1)
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 #237B64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.034
- Dark Aquamarine #017371 ΔE 0.040
- Teal #008080 ΔE 0.041
- Deep Turquoise #017374 ΔE 0.043
- Deep Aqua #08787F ΔE 0.047
- Sea Green #2E8B57 ΔE 0.060
- Jungle Green #048243 ΔE 0.060
- Dark Sage #598556 ΔE 0.064
Use #237B64 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.