#104C51
Closest named color: Dark Teal (#014D4E). oklch(38.2% 0.059 203.3), rgb(16, 76, 81).
Aa
White text reads best on this color (9.65:1).
About this color
#104C51 is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.059 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Teal (#014D4E), ΔE 0.010 away. White text reads best on it, at 9.65:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Teal (#014D4E) |
| Black text | 2.17:1 |
| White text | 9.65:1 |
Values
| HEX | #104C51 |
| RGB | rgb(16, 76, 81) |
| HSL | hsl(185, 67%, 19%) |
| OKLCH | oklch(38.2% 0.059 203.3) |
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 #104C51 | 9.65:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #104C51 | 2.17:1 | Fails | Lc 11.9 | Not readable |
| #104C51 text on white | 9.65:1 | AAA | Lc 92.1 | Preferred for body text |
| #104C51 text on black | 2.17:1 | Fails | Lc -10.3 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C7DEE0
oklch(88.4% 0.025 203.1)
-
Step 300
300
#A0C9CD
oklch(80.8% 0.044 203.7)
-
Step 400
400
#69AEB4
oklch(70.7% 0.07 202.8)
-
Step 500
500
#3799A2
oklch(63% 0.09 203.8)
-
Step 600
600
#00838C
oklch(55.6% 0.095 203.3)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900 (this color)
#104C51
oklch(38.2% 0.059 203.3)
-
Step 950
950
#0C2C2F
oklch(27.1% 0.037 203.8)
#104C51 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) | #454851 | 0.058 |
| Deuteranopia (no green cones) | #3C4251 | 0.053 |
| Tritanopia (no blue cones) | #004F4D | 0.015 |
| Achromatopsia (no color) | #454545 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104C51
#104C51
oklch(38.2% 0.059 203.3)
- #5F3634
#5F3634
oklch(38.3% 0.059 23.2)
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 #104C51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Teal #014D4E ΔE 0.010
- Charcoal #264653 ΔE 0.026
- Dark Blue Green #005249 ΔE 0.028
- Deep Teal #00555A ΔE 0.029
- Dark Slate Gray #2F4F4F ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.055
Use #104C51 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.