#104D66
Closest named color: Dark Grey Blue (#29465B). oklch(39.6% 0.072 230.9), rgb(16, 77, 102).
Aa
White text reads best on this color (9.22:1).
About this color
#104D66 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.072 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.029 away. White text reads best on it, at 9.22:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.27:1 |
| White text | 9.22:1 |
Values
| HEX | #104D66 |
| RGB | rgb(16, 77, 102) |
| HSL | hsl(197, 73%, 23%) |
| OKLCH | oklch(39.6% 0.072 230.9) |
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 #104D66 | 9.22:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #104D66 | 2.27:1 | Fails | Lc 13.0 | Not readable |
| #104D66 text on white | 9.22:1 | AAA | Lc 90.9 | Preferred for body text |
| #104D66 text on black | 2.27:1 | Fails | Lc -11.4 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C6DDEA
oklch(88.4% 0.03 232.5)
-
Step 300
300
#9EC8DE
oklch(81% 0.054 231.1)
-
Step 400
400
#65ABCD
oklch(70.8% 0.086 230.8)
-
Step 500
500
#3095C0
oklch(63.1% 0.111 230.9)
-
Step 600
600
#007EA8
oklch(55.6% 0.112 230.6)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900 (this color)
#104D66
oklch(39.6% 0.072 230.9)
-
Step 950
950
#092A39
oklch(26.9% 0.046 232.1)
#104D66 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) | #404C67 | 0.048 |
| Deuteranopia (no green cones) | #354466 | 0.041 |
| Tritanopia (no blue cones) | #005455 | 0.043 |
| Achromatopsia (no color) | #474747 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104D66
#104D66
oklch(39.6% 0.072 230.9)
- #653A20
#653A20
oklch(39.5% 0.072 50.6)
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 #104D66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal #264653 ΔE 0.035
- Deep Teal #00555A ΔE 0.038
- Dark Teal #014D4E ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.047
- Light Navy #155084 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.052
Use #104D66 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.