#1B5755
Closest named color: Deep Teal (#00555A). oklch(41.8% 0.06 191.9), rgb(27, 87, 85).
Aa
White text reads best on this color (8.26:1).
About this color
#1B5755 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.060 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.017 away. White text reads best on it, at 8.26:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.54:1 |
| White text | 8.26:1 |
Values
| HEX | #1B5755 |
| RGB | rgb(27, 87, 85) |
| HSL | hsl(178, 53%, 22%) |
| OKLCH | oklch(41.8% 0.06 191.9) |
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 #1B5755 | 8.26:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #1B5755 | 2.54:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #1B5755 text on white | 8.26:1 | AAA | Lc 88.3 | Fine for body text |
| #1B5755 text on black | 2.54:1 | Fails | Lc -13.9 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CBDDDC
oklch(88.4% 0.019 192.8)
-
Step 300
300
#A7C8C6
oklch(80.8% 0.035 192)
-
Step 400
400
#77ACAA
oklch(70.7% 0.056 193)
-
Step 500
500
#509895
oklch(63.2% 0.073 191.9)
-
Step 600
600
#2F827F
oklch(55.6% 0.079 191.8)
-
Step 700
700
#216E6B
oklch(49.2% 0.073 191.3)
-
Step 800
800 (this color)
#1B5755
oklch(41.8% 0.06 191.9)
-
Step 900
900
#1F4A48
oklch(37.8% 0.048 191.2)
-
Step 950
950
#132B2A
oklch(26.9% 0.03 192)
#1B5755 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) | #525255 | 0.065 |
| Deuteranopia (no green cones) | #484C56 | 0.059 |
| Tritanopia (no blue cones) | #005A56 | 0.013 |
| Achromatopsia (no color) | #4E4E4E | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5755
#1B5755
oklch(41.8% 0.06 191.9)
- #693E44
#693E44
oklch(41.7% 0.061 11)
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 #1B5755, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.017
- Dark Slate Gray #2F4F4F ΔE 0.028
- Dark Blue Green #005249 ΔE 0.029
- Petrol #005F6A ΔE 0.036
- Dark Teal #014D4E ΔE 0.038
- Dark Green Blue #1F6357 ΔE 0.040
- Charcoal #264653 ΔE 0.055
- Dark Aqua #05696B ΔE 0.058
Use #1B5755 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.