#155166
Closest named color: Deep Teal (#00555A). oklch(40.8% 0.069 226.1), rgb(21, 81, 102).
Aa
White text reads best on this color (8.74:1).
About this color
#155166 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.069 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.029 away. White text reads best on it, at 8.74:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.40:1 |
| White text | 8.74:1 |
Values
| HEX | #155166 |
| RGB | rgb(21, 81, 102) |
| HSL | hsl(196, 66%, 24%) |
| OKLCH | oklch(40.8% 0.069 226.1) |
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 #155166 | 8.74:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #155166 | 2.40:1 | Fails | Lc 14.3 | Not readable |
| #155166 text on white | 8.74:1 | AAA | Lc 89.7 | Fine for body text |
| #155166 text on black | 2.40:1 | Fails | Lc -12.6 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CBDDE4
oklch(88.6% 0.022 223)
-
Step 300
300
#A6C7D5
oklch(81% 0.041 225.4)
-
Step 400
400
#75A9BF
oklch(70.6% 0.064 226.3)
-
Step 500
500
#4E94AF
oklch(63.2% 0.081 225.5)
-
Step 600
600
#2D7E9B
oklch(55.7% 0.089 225.7)
-
Step 700
700
#1E6A84
oklch(49.1% 0.082 225.5)
-
Step 800
800 (this color)
#155166
oklch(40.8% 0.069 226.1)
-
Step 900
900
#1E4757
oklch(37.6% 0.053 226.4)
-
Step 950
950
#132A33
oklch(27.1% 0.033 225.6)
#155166 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) | #464F67 | 0.052 |
| Deuteranopia (no green cones) | #3B4766 | 0.046 |
| Tritanopia (no blue cones) | #005758 | 0.037 |
| Achromatopsia (no color) | #4B4B4B | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155166
#155166
oklch(40.8% 0.069 226.1)
- #683D29
#683D29
oklch(40.7% 0.068 45.3)
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 #155166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.029
- Dark Grey Blue #29465B ΔE 0.036
- Charcoal #264653 ΔE 0.041
- Dark Slate Gray #2F4F4F ΔE 0.041
- Dark Teal #014D4E ΔE 0.043
- Petrol #005F6A ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.046
- Light Navy #155084 ΔE 0.052
Use #155166 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.