#104C70
Closest named color: Deep Sea Blue (#015482). oklch(39.9% 0.084 241), rgb(16, 76, 112).
Aa
White text reads best on this color (9.17:1).
About this color
#104C70 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.084 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.035 away. White text reads best on it, at 9.17:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.28:1 |
| White text | 9.17:1 |
Values
| HEX | #104C70 |
| RGB | rgb(16, 76, 112) |
| HSL | hsl(203, 75%, 25%) |
| OKLCH | oklch(39.9% 0.084 241) |
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 #104C70 | 9.17:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #104C70 | 2.28:1 | Fails | Lc 13.2 | Not readable |
| #104C70 text on white | 9.17:1 | AAA | Lc 90.8 | Preferred for body text |
| #104C70 text on black | 2.28:1 | Fails | Lc -11.6 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C5DDEF
oklch(88.5% 0.036 240.3)
-
Step 300
300
#9DC7E6
oklch(81% 0.063 240.5)
-
Step 400
400
#63A9DA
oklch(70.8% 0.101 240.7)
-
Step 500
500
#2E92D0
oklch(63.2% 0.129 241.1)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900 (this color)
#104C70
oklch(39.9% 0.084 241)
-
Step 950
950
#09293E
oklch(27% 0.054 241.8)
#104C70 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) | #3B4D72 | 0.042 |
| Deuteranopia (no green cones) | #2E446F | 0.032 |
| Tritanopia (no blue cones) | #005559 | 0.056 |
| Achromatopsia (no color) | #484848 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104C70
#104C70
oklch(39.9% 0.084 241)
- #673B0D
#673B0D
oklch(39.8% 0.084 61.2)
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 #104C70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.035
- Light Navy #155084 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.038
- Charcoal #264653 ΔE 0.049
- Deep Teal #00555A ΔE 0.054
- Dusk Blue #26538D ΔE 0.055
- Cobalt #1E488F ΔE 0.057
Use #104C70 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.