#1D5B57
Closest named color: Dark Green Blue (#1F6357). oklch(43.1% 0.063 189.1), rgb(29, 91, 87).
Aa
White text reads best on this color (7.81:1).
About this color
#1D5B57 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.063 and its hue 189°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.027 away. White text reads best on it, at 7.81:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #1D5B57 |
| RGB | rgb(29, 91, 87) |
| HSL | hsl(176, 52%, 24%) |
| OKLCH | oklch(43.1% 0.063 189.1) |
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 #1D5B57 | 7.81:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #1D5B57 | 2.68:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #1D5B57 text on white | 7.81:1 | AAA | Lc 86.9 | Fine for body text |
| #1D5B57 text on black | 2.68:1 | Fails | Lc -15.2 | Dividers and decoration only |
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
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CBDEDC
oklch(88.6% 0.02 189.2)
-
Step 300
300
#A7C9C5
oklch(81% 0.037 187.7)
-
Step 400
400
#75ADA8
oklch(70.7% 0.059 188.9)
-
Step 500
500
#4E9893
oklch(63.1% 0.074 189.7)
-
Step 600
600
#2C827D
oklch(55.5% 0.081 189.6)
-
Step 700
700
#1D6E69
oklch(49% 0.076 188.9)
-
Step 800
800 (this color)
#1D5B57
oklch(43.1% 0.063 189.1)
-
Step 900
900
#1E4A47
oklch(37.7% 0.049 189.3)
-
Step 950
950
#132B29
oklch(26.9% 0.03 188.5)
#1D5B57 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) | #565657 | 0.067 |
| Deuteranopia (no green cones) | #4C4F58 | 0.062 |
| Tritanopia (no blue cones) | #005D5A | 0.012 |
| Achromatopsia (no color) | #525252 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D5B57
#1D5B57
oklch(43.1% 0.063 189.1)
- #6E4149
#6E4149
oklch(43.1% 0.063 8.5)
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 #1D5B57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.027
- Deep Teal #00555A ΔE 0.027
- Petrol #005F6A ΔE 0.030
- Dark Slate Gray #2F4F4F ΔE 0.038
- Dark Blue Green #005249 ΔE 0.039
- Dark Aqua #05696B ΔE 0.046
- Dark Teal #014D4E ΔE 0.050
- Pine #2B5D34 ΔE 0.057
Use #1D5B57 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.