#1B665B
Closest named color: Dark Green Blue (#1F6357). oklch(46.2% 0.074 181), rgb(27, 102, 91).
Aa
White text reads best on this color (6.77:1).
About this color
#1B665B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.074 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.010 away. White text reads best on it, at 6.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.09:1 |
| White text | 6.77:1 |
Values
| HEX | #1B665B |
| RGB | rgb(27, 102, 91) |
| HSL | hsl(171, 58%, 25%) |
| OKLCH | oklch(46.2% 0.074 181) |
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 #1B665B | 6.77:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #1B665B | 3.09:1 | AA large text | Lc 21.0 | Dividers and decoration only |
| #1B665B text on white | 6.77:1 | AA | Lc 83.1 | Fine for body text |
| #1B665B text on black | 3.09:1 | AA large text | Lc -18.9 | 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 700.
-
Step 50
50
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDEDA
oklch(88.6% 0.02 181.1)
-
Step 300
300
#A9C9C2
oklch(81% 0.036 180.6)
-
Step 400
400
#79ADA2
oklch(70.8% 0.057 179.9)
-
Step 500
500
#53988C
oklch(63.1% 0.073 181.3)
-
Step 600
600
#348276
oklch(55.5% 0.079 181.6)
-
Step 700
700 (this color)
#1B665B
oklch(46.2% 0.074 181)
-
Step 800
800
#215A51
oklch(42.7% 0.061 181.2)
-
Step 900
900
#214A43
oklch(37.7% 0.048 181)
-
Step 950
950
#152B27
oklch(26.9% 0.029 181)
#1B665B 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) | #61605B | 0.078 |
| Deuteranopia (no green cones) | #57585C | 0.074 |
| Tritanopia (no blue cones) | #006863 | 0.014 |
| Achromatopsia (no color) | #5B5B5B | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B665B
#1B665B
oklch(46.2% 0.074 181)
- #7A4756
#7A4756
oklch(46.3% 0.072 1.3)
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 #1B665B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.010
- Dark Aqua #05696B ΔE 0.024
- Petrol #005F6A ΔE 0.040
- Dark Aquamarine #017371 ΔE 0.045
- Deep Turquoise #017374 ΔE 0.047
- Spruce #0A5F38 ΔE 0.056
- Pine #2B5D34 ΔE 0.056
- Deep Teal #00555A ΔE 0.059
Use #1B665B 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.