#155665
Closest named color: Deep Teal (#00555A). oklch(42.1% 0.067 217), rgb(21, 86, 101).
Aa
White text reads best on this color (8.23:1).
About this color
#155665 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.067 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.022 away. White text reads best on it, at 8.23:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #155665 |
| RGB | rgb(21, 86, 101) |
| HSL | hsl(191, 66%, 24%) |
| OKLCH | oklch(42.1% 0.067 217) |
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 #155665 | 8.23:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #155665 | 2.55:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #155665 text on white | 8.23:1 | AAA | Lc 88.1 | Fine for body text |
| #155665 text on black | 2.55:1 | Fails | Lc -14.0 | 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
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE3
oklch(88.5% 0.022 218.6)
-
Step 300
300
#A5C7D1
oklch(80.8% 0.039 217.5)
-
Step 400
400
#73ABBA
oklch(70.8% 0.062 216.4)
-
Step 500
500
#4A95A9
oklch(63% 0.08 217.6)
-
Step 600
600
#268094
oklch(55.7% 0.087 216)
-
Step 700
700
#176C7E
oklch(49.2% 0.081 216)
-
Step 800
800 (this color)
#155665
oklch(42.1% 0.067 217)
-
Step 900
900
#1B4854
oklch(37.6% 0.053 218.2)
-
Step 950
950
#122A31
oklch(26.9% 0.033 219.1)
#155665 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) | #4C5366 | 0.058 |
| Deuteranopia (no green cones) | #414B65 | 0.053 |
| Tritanopia (no blue cones) | #005B5B | 0.028 |
| Achromatopsia (no color) | #4F4F4F | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155665
#155665
oklch(42.1% 0.067 217)
- #6D4033
#6D4033
oklch(42.2% 0.067 36.9)
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 #155665, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.022
- Petrol #005F6A ΔE 0.028
- Dark Slate Gray #2F4F4F ΔE 0.039
- Dark Teal #014D4E ΔE 0.046
- Dark Blue Green #005249 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.051
- Charcoal #264653 ΔE 0.052
Use #155665 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.