#1B4641
Closest named color: Dark Teal (#014D4E). oklch(36.2% 0.048 185.1), rgb(27, 70, 65).
Aa
White text reads best on this color (10.50:1).
About this color
#1B4641 is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.048 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Teal (#014D4E), ΔE 0.027 away. White text reads best on it, at 10.50:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Teal (#014D4E) |
| Black text | 1.99:1 |
| White text | 10.50:1 |
Values
| HEX | #1B4641 |
| RGB | rgb(27, 70, 65) |
| HSL | hsl(173, 44%, 19%) |
| OKLCH | oklch(36.2% 0.048 185.1) |
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 #1B4641 | 10.50:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #1B4641 | 1.99:1 | Fails | Lc 9.7 | Not readable |
| #1B4641 text on white | 10.50:1 | AAA | Lc 94.2 | Preferred for body text |
| #1B4641 text on black | 1.99:1 | Fails | Lc -8.4 | 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 900.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CBDEDB
oklch(88.6% 0.021 185.4)
-
Step 300
300
#A7C9C4
oklch(81% 0.037 185.6)
-
Step 400
400
#77ADA5
oklch(70.8% 0.058 184.5)
-
Step 500
500
#50988F
oklch(63% 0.074 185)
-
Step 600
600
#2F8379
oklch(55.7% 0.081 184.2)
-
Step 700
700
#216E66
oklch(49% 0.074 185.2)
-
Step 800
800
#1E5A53
oklch(42.7% 0.062 184.4)
-
Step 900
900 (this color)
#1B4641
oklch(36.2% 0.048 185.1)
-
Step 950
950
#132B28
oklch(26.8% 0.031 185.1)
#1B4641 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) | #434241 | 0.052 |
| Deuteranopia (no green cones) | #3C3D42 | 0.049 |
| Tritanopia (no blue cones) | #004844 | 0.015 |
| Achromatopsia (no color) | #3F3F3F | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4641
#1B4641
oklch(36.2% 0.048 185.1)
- #53333A
#53333A
oklch(36.2% 0.047 5.4)
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 #1B4641, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Teal #014D4E ΔE 0.027
- Charcoal #264653 ΔE 0.035
- Dark Blue Green #005249 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.043
- Evergreen #05472A ΔE 0.044
- Onyx #343A40 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.049
Use #1B4641 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.