#104C5B
Closest named color: Charcoal (#264653). oklch(38.7% 0.063 218.9), rgb(16, 76, 91).
Aa
White text reads best on this color (9.51:1).
About this color
#104C5B is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.063 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.024 away. White text reads best on it, at 9.51:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.20:1 |
| White text | 9.51:1 |
Values
| HEX | #104C5B |
| RGB | rgb(16, 76, 91) |
| HSL | hsl(192, 70%, 21%) |
| OKLCH | oklch(38.7% 0.063 218.9) |
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 #104C5B | 9.51:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #104C5B | 2.20:1 | Fails | Lc 12.2 | Not readable |
| #104C5B text on white | 9.51:1 | AAA | Lc 91.7 | Preferred for body text |
| #104C5B text on black | 2.20:1 | Fails | Lc -10.7 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C7DEE5
oklch(88.6% 0.026 218)
-
Step 300
300
#9FC9D5
oklch(81% 0.047 217.1)
-
Step 400
400
#67ACC1
oklch(70.7% 0.076 219.5)
-
Step 500
500
#3597B1
oklch(63.1% 0.097 219)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586B
oklch(42.5% 0.077 219.1)
-
Step 900
900 (this color)
#104C5B
oklch(38.7% 0.063 218.9)
-
Step 950
950
#0B2B34
oklch(27% 0.04 219.8)
#104C5B 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) | #434A5C | 0.054 |
| Deuteranopia (no green cones) | #39425B | 0.049 |
| Tritanopia (no blue cones) | #005151 | 0.028 |
| Achromatopsia (no color) | #454545 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104C5B
#104C5B
oklch(38.7% 0.063 218.9)
- #61382A
#61382A
oklch(38.7% 0.063 39.6)
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 #104C5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.024
- Dark Teal #014D4E ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.026
- Deep Teal #00555A ΔE 0.030
- Dark Slate Gray #2F4F4F ΔE 0.036
- Dark Blue Green #005249 ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.059
Use #104C5B 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.