#12737C
Closest named color: Deep Turquoise (#017374). oklch(50.9% 0.083 204.9), rgb(18, 115, 124).
Aa
White text reads best on this color (5.57:1).
About this color
#12737C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.083 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.015 away. White text reads best on it, at 5.57:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #12737C |
| RGB | rgb(18, 115, 124) |
| HSL | hsl(185, 75%, 28%) |
| OKLCH | oklch(50.9% 0.083 204.9) |
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 #12737C | 5.57:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #12737C | 3.76:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #12737C text on white | 5.57:1 | AA | Lc 77.4 | Fine for body text |
| #12737C text on black | 3.76:1 | AA large text | Lc -24.3 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#C9DEE0
oklch(88.6% 0.023 203.7)
-
Step 300
300
#A3C9CD
oklch(81% 0.041 204.3)
-
Step 400
400
#6FADB3
oklch(70.8% 0.064 203.6)
-
Step 500
500
#4498A1
oklch(63.2% 0.082 204.8)
-
Step 600
600
#1A828C
oklch(55.6% 0.089 205)
-
Step 700
700 (this color)
#12737C
oklch(50.9% 0.083 204.9)
-
Step 800
800
#0E5A61
oklch(42.8% 0.069 204.6)
-
Step 900
900
#174A4F
oklch(37.8% 0.054 204.3)
-
Step 950
950
#102B2E
oklch(27% 0.033 205.1)
#12737C 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) | #696E7D | 0.082 |
| Deuteranopia (no green cones) | #5B647C | 0.074 |
| Tritanopia (no blue cones) | #007876 | 0.021 |
| Achromatopsia (no color) | #686868 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12737C
#12737C
oklch(50.9% 0.083 204.9)
- #8F524E
#8F524E
oklch(50.9% 0.082 24.4)
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 #12737C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.015
- Deep Aqua #08787F ΔE 0.015
- Dark Aquamarine #017371 ΔE 0.019
- Bluegreen #017A79 ΔE 0.024
- Ocean #017B92 ΔE 0.037
- Dark Aqua #05696B ΔE 0.038
- Teal #008080 ΔE 0.039
- Sea Blue #047495 ΔE 0.040
Use #12737C 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.