#1B4E47
Closest named color: Dark Blue Green (#005249). oklch(38.8% 0.055 182.9), rgb(27, 78, 71).
Aa
White text reads best on this color (9.42:1).
About this color
#1B4E47 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.055 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.016 away. White text reads best on it, at 9.42:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.22:1 |
| White text | 9.42:1 |
Values
| HEX | #1B4E47 |
| RGB | rgb(27, 78, 71) |
| HSL | hsl(172, 49%, 21%) |
| OKLCH | oklch(38.8% 0.055 182.9) |
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 #1B4E47 | 9.42:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #1B4E47 | 2.22:1 | Fails | Lc 12.4 | Not readable |
| #1B4E47 text on white | 9.42:1 | AAA | Lc 91.6 | Preferred for body text |
| #1B4E47 text on black | 2.22:1 | Fails | Lc -10.8 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#C9DEDA
oklch(88.4% 0.023 183.1)
-
Step 300
300
#A4CAC3
oklch(80.9% 0.042 182.8)
-
Step 400
400
#70AFA4
oklch(70.8% 0.067 182.1)
-
Step 500
500
#459A8E
oklch(63% 0.084 183)
-
Step 600
600
#1B8578
oklch(55.7% 0.093 182.4)
-
Step 700
700
#077065
oklch(49% 0.086 183)
-
Step 800
800
#0F5B52
oklch(42.5% 0.071 182.8)
-
Step 900
900 (this color)
#1B4E47
oklch(38.8% 0.055 182.9)
-
Step 950
950
#102C28
oklch(27% 0.035 183.1)
#1B4E47 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) | #4A4947 | 0.059 |
| Deuteranopia (no green cones) | #424448 | 0.055 |
| Tritanopia (no blue cones) | #00504C | 0.014 |
| Achromatopsia (no color) | #464646 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4E47
#1B4E47
oklch(38.8% 0.055 182.9)
- #5D3741
#5D3741
oklch(38.6% 0.056 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 #1B4E47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.016
- Dark Teal #014D4E ΔE 0.018
- Dark Slate Gray #2F4F4F ΔE 0.026
- Deep Teal #00555A ΔE 0.033
- Charcoal #264653 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.052
- Evergreen #05472A ΔE 0.052
Use #1B4E47 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.