#1B4C40
Closest named color: Dark Blue Green (#005249). oklch(37.9% 0.057 174.3), rgb(27, 76, 64).
Aa
White text reads best on this color (9.74:1).
About this color
#1B4C40 is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.057 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.022 away. White text reads best on it, at 9.74:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.15:1 |
| White text | 9.74:1 |
Values
| HEX | #1B4C40 |
| RGB | rgb(27, 76, 64) |
| HSL | hsl(165, 48%, 20%) |
| OKLCH | oklch(37.9% 0.057 174.3) |
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 #1B4C40 | 9.74:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #1B4C40 | 2.15:1 | Fails | Lc 11.5 | Not readable |
| #1B4C40 text on white | 9.74:1 | AAA | Lc 92.4 | Preferred for body text |
| #1B4C40 text on black | 2.15:1 | Fails | Lc -10.0 | 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 900.
-
Step 50
50
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CADFD8
oklch(88.6% 0.024 173.8)
-
Step 300
300
#A5CABF
oklch(80.9% 0.042 175.2)
-
Step 400
400
#72AF9E
oklch(70.7% 0.068 174.8)
-
Step 500
500
#489B86
oklch(63.2% 0.088 174.5)
-
Step 600
600
#23856F
oklch(55.6% 0.095 174.1)
-
Step 700
700
#12715D
oklch(49.2% 0.089 174)
-
Step 800
800
#155C4C
oklch(42.8% 0.073 174)
-
Step 900
900 (this color)
#1B4C40
oklch(37.9% 0.057 174.3)
-
Step 950
950
#112C25
oklch(26.9% 0.036 174.4)
#1B4C40 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) | #49473F | 0.059 |
| Deuteranopia (no green cones) | #424241 | 0.056 |
| Tritanopia (no blue cones) | #004D48 | 0.017 |
| Achromatopsia (no color) | #444444 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4C40
#1B4C40
oklch(37.9% 0.057 174.3)
- #5A3544
#5A3544
oklch(37.9% 0.057 354.3)
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 #1B4C40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.022
- Dark Teal #014D4E ΔE 0.024
- Dark Slate Gray #2F4F4F ΔE 0.035
- Evergreen #05472A ΔE 0.041
- Deep Teal #00555A ΔE 0.044
- Charcoal #264653 ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.052
- Pine Green #0A481E ΔE 0.054
Use #1B4C40 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.