#105A5B
Closest named color: Deep Teal (#00555A). oklch(42.6% 0.067 196.3), rgb(16, 90, 91).
Aa
White text reads best on this color (7.96:1).
About this color
#105A5B is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.067 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.018 away. White text reads best on it, at 7.96:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.63:1 |
| White text | 7.96:1 |
Values
| HEX | #105A5B |
| RGB | rgb(16, 90, 91) |
| HSL | hsl(181, 70%, 21%) |
| OKLCH | oklch(42.6% 0.067 196.3) |
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 #105A5B | 7.96:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #105A5B | 2.63:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #105A5B text on white | 7.96:1 | AAA | Lc 87.3 | Fine for body text |
| #105A5B text on black | 2.63:1 | Fails | Lc -14.8 | 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 800.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#C9DEDE
oklch(88.5% 0.022 196.8)
-
Step 300
300
#A4C9C9
oklch(80.9% 0.039 196.4)
-
Step 400
400
#70ADAE
oklch(70.7% 0.063 197.1)
-
Step 500
500
#45999A
oklch(63.2% 0.081 196.4)
-
Step 600
600
#1D8384
oklch(55.6% 0.088 195.9)
-
Step 700
700
#0A6F70
oklch(49.2% 0.082 196)
-
Step 800
800 (this color)
#105A5B
oklch(42.6% 0.067 196.3)
-
Step 900
900
#184A4B
oklch(37.7% 0.052 197)
-
Step 950
950
#102B2C
oklch(26.9% 0.033 198.6)
#105A5B 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) | #53555B | 0.070 |
| Deuteranopia (no green cones) | #494D5B | 0.066 |
| Tritanopia (no blue cones) | #005D5A | 0.011 |
| Achromatopsia (no color) | #515151 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #105A5B
#105A5B
oklch(42.6% 0.067 196.3)
- #6F3F42
#6F3F42
oklch(42.7% 0.067 16.3)
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 #105A5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.018
- Petrol #005F6A ΔE 0.025
- Dark Green Blue #1F6357 ΔE 0.035
- Dark Blue Green #005249 ΔE 0.037
- Dark Slate Gray #2F4F4F ΔE 0.038
- Dark Teal #014D4E ΔE 0.045
- Dark Aqua #05696B ΔE 0.048
- Charcoal #264653 ΔE 0.063
Use #105A5B 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.