#12555E
Closest named color: Deep Teal (#00555A). oklch(41.4% 0.065 208.4), rgb(18, 85, 94).
Aa
White text reads best on this color (8.44:1).
About this color
#12555E is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.065 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.010 away. White text reads best on it, at 8.44:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.48:1 |
| White text | 8.44:1 |
Values
| HEX | #12555E |
| RGB | rgb(18, 85, 94) |
| HSL | hsl(187, 68%, 22%) |
| OKLCH | oklch(41.4% 0.065 208.4) |
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 #12555E | 8.44:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #12555E | 2.48:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #12555E text on white | 8.44:1 | AAA | Lc 88.8 | Fine for body text |
| #12555E text on black | 2.48:1 | Fails | Lc -13.4 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A5C8CE
oklch(80.9% 0.038 209.1)
-
Step 400
400
#73ACB5
oklch(70.8% 0.061 208.3)
-
Step 500
500
#4A97A2
oklch(63.2% 0.077 207.7)
-
Step 600
600
#26818D
oklch(55.6% 0.084 207.9)
-
Step 700
700
#166D78
oklch(49.2% 0.078 207.9)
-
Step 800
800 (this color)
#12555E
oklch(41.4% 0.065 208.4)
-
Step 900
900
#1B4950
oklch(37.7% 0.051 208.9)
-
Step 950
950
#122B2F
oklch(27.1% 0.032 209)
#12555E 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) | #4D515F | 0.063 |
| Deuteranopia (no green cones) | #424A5E | 0.056 |
| Tritanopia (no blue cones) | #005958 | 0.020 |
| Achromatopsia (no color) | #4D4D4D | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12555E
#12555E
oklch(41.4% 0.065 208.4)
- #6A3D37
#6A3D37
oklch(41.3% 0.065 28.3)
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 #12555E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.010
- Dark Slate Gray #2F4F4F ΔE 0.031
- Petrol #005F6A ΔE 0.032
- Dark Teal #014D4E ΔE 0.036
- Dark Blue Green #005249 ΔE 0.037
- Charcoal #264653 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.048
- Dark Green Blue #1F6357 ΔE 0.053
Use #12555E 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.