#1B5C68
Closest named color: Petrol (#005F6A). oklch(44% 0.066 212.5), rgb(27, 92, 104).
Aa
White text reads best on this color (7.56:1).
About this color
#1B5C68 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.066 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.012 away. White text reads best on it, at 7.56:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.77:1 |
| White text | 7.56:1 |
Values
| HEX | #1B5C68 |
| RGB | rgb(27, 92, 104) |
| HSL | hsl(189, 59%, 26%) |
| OKLCH | oklch(44% 0.066 212.5) |
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 #1B5C68 | 7.56:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #1B5C68 | 2.77:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #1B5C68 text on white | 7.56:1 | AAA | Lc 86.0 | Fine for body text |
| #1B5C68 text on black | 2.77:1 | Fails | Lc -16.1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE1
oklch(88.5% 0.021 211.8)
-
Step 300
300
#A5C8CF
oklch(81% 0.039 211.1)
-
Step 400
400
#72ABB7
oklch(70.6% 0.062 212.3)
-
Step 500
500
#4996A6
oklch(63.1% 0.079 213.1)
-
Step 600
600
#258091
oklch(55.5% 0.086 213)
-
Step 700
700
#156C7B
oklch(49% 0.08 212.5)
-
Step 800
800 (this color)
#1B5C68
oklch(44% 0.066 212.5)
-
Step 900
900
#1B4952
oklch(37.8% 0.052 212.6)
-
Step 950
950
#112B30
oklch(27.1% 0.033 211.7)
#1B5C68 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) | #535969 | 0.061 |
| Deuteranopia (no green cones) | #485168 | 0.055 |
| Tritanopia (no blue cones) | #006160 | 0.026 |
| Achromatopsia (no color) | #545454 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5C68
#1B5C68
oklch(44% 0.066 212.5)
- #73443B
#73443B
oklch(44% 0.067 31.6)
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 #1B5C68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.012
- Deep Teal #00555A ΔE 0.034
- Dark Aqua #05696B ΔE 0.040
- Dark Green Blue #1F6357 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.047
- Dark Slate Gray #2F4F4F ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.057
- Dark Blue Green #005249 ΔE 0.059
Use #1B5C68 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.