#1B5059
Closest named color: Deep Teal (#00555A). oklch(40% 0.057 210.7), rgb(27, 80, 89).
Aa
White text reads best on this color (8.98:1).
About this color
#1B5059 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.057 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.018 away. White text reads best on it, at 8.98:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.33:1 |
| White text | 8.98:1 |
Values
| HEX | #1B5059 |
| RGB | rgb(27, 80, 89) |
| HSL | hsl(189, 53%, 23%) |
| OKLCH | oklch(40% 0.057 210.7) |
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 #1B5059 | 8.98:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #1B5059 | 2.33:1 | Fails | Lc 13.6 | Not readable |
| #1B5059 text on white | 8.98:1 | AAA | Lc 90.4 | Preferred for body text |
| #1B5059 text on black | 2.33:1 | Fails | Lc -11.9 | 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 900.
-
Step 50
50
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE2
oklch(88.5% 0.024 209.8)
-
Step 300
300
#A2C9D0
oklch(81% 0.042 209.7)
-
Step 400
400
#6CACB9
oklch(70.6% 0.068 211.9)
-
Step 500
500
#3E98A7
oklch(63.2% 0.087 210.2)
-
Step 600
600
#0A8292
oklch(55.7% 0.094 210.1)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#045965
oklch(42.6% 0.073 210.8)
-
Step 900
900 (this color)
#1B5059
oklch(40% 0.057 210.7)
-
Step 950
950
#0E2B30
oklch(27% 0.036 210.5)
#1B5059 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) | #484D5A | 0.053 |
| Deuteranopia (no green cones) | #3F4659 | 0.049 |
| Tritanopia (no blue cones) | #005453 | 0.023 |
| Achromatopsia (no color) | #494949 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5059
#1B5059
oklch(40% 0.057 210.7)
- #633C35
#633C35
oklch(40.1% 0.057 30.8)
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 #1B5059, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.018
- Dark Slate Gray #2F4F4F ΔE 0.023
- Dark Teal #014D4E ΔE 0.026
- Charcoal #264653 ΔE 0.031
- Dark Blue Green #005249 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.035
- Petrol #005F6A ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.058
Use #1B5059 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.