#104F59
Closest named color: Deep Teal (#00555A). oklch(39.5% 0.062 210.8), rgb(16, 79, 89).
Aa
White text reads best on this color (9.19:1).
About this color
#104F59 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.062 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.019 away. White text reads best on it, at 9.19:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.28:1 |
| White text | 9.19:1 |
Values
| HEX | #104F59 |
| RGB | rgb(16, 79, 89) |
| HSL | hsl(188, 70%, 21%) |
| OKLCH | oklch(39.5% 0.062 210.8) |
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 #104F59 | 9.19:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #104F59 | 2.28:1 | Fails | Lc 13.1 | Not readable |
| #104F59 text on white | 9.19:1 | AAA | Lc 90.9 | Preferred for body text |
| #104F59 text on black | 2.28:1 | Fails | Lc -11.5 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECEF
oklch(93.5% 0.013 214.4)
-
Step 200
200
#C7DEE3
oklch(88.5% 0.025 212.2)
-
Step 300
300
#9EC9D2
oklch(80.8% 0.047 211.9)
-
Step 400
400
#66ADBB
oklch(70.6% 0.074 211.6)
-
Step 500
500
#3099AA
oklch(63.2% 0.096 210.6)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900 (this color)
#104F59
oklch(39.5% 0.062 210.8)
-
Step 950
950
#0A2C31
oklch(27.1% 0.039 208.9)
#104F59 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) | #474C5A | 0.059 |
| Deuteranopia (no green cones) | #3D4559 | 0.052 |
| Tritanopia (no blue cones) | #005352 | 0.021 |
| Achromatopsia (no color) | #484848 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104F59
#104F59
oklch(39.5% 0.062 210.8)
- #633932
#633932
oklch(39.4% 0.061 30.2)
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 #104F59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.019
- Dark Teal #014D4E ΔE 0.021
- Dark Slate Gray #2F4F4F ΔE 0.029
- Charcoal #264653 ΔE 0.030
- Dark Blue Green #005249 ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.035
- Petrol #005F6A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.060
Use #104F59 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.