#104B70
Closest named color: Twilight Blue (#0A437A). oklch(39.6% 0.085 242.1), rgb(16, 75, 112).
Aa
White text reads best on this color (9.28:1).
About this color
#104B70 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.085 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.033 away. White text reads best on it, at 9.28:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.26:1 |
| White text | 9.28:1 |
Values
| HEX | #104B70 |
| RGB | rgb(16, 75, 112) |
| HSL | hsl(203, 75%, 25%) |
| OKLCH | oklch(39.6% 0.085 242.1) |
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 #104B70 | 9.28:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #104B70 | 2.26:1 | Fails | Lc 12.9 | Not readable |
| #104B70 text on white | 9.28:1 | AAA | Lc 91.1 | Preferred for body text |
| #104B70 text on black | 2.26:1 | Fails | Lc -11.3 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DDEF
oklch(88.6% 0.035 241.5)
-
Step 300
300
#9DC6E7
oklch(80.8% 0.064 242.9)
-
Step 400
400
#64A8DB
oklch(70.7% 0.102 242.5)
-
Step 500
500
#2F91D1
oklch(63% 0.131 242.3)
-
Step 600
600
#007AB9
oklch(55.5% 0.132 242.1)
-
Step 700
700
#00679D
oklch(49.2% 0.117 242)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900 (this color)
#104B70
oklch(39.6% 0.085 242.1)
-
Step 950
950
#09293E
oklch(27% 0.054 241.8)
#104B70 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) | #3A4C72 | 0.041 |
| Deuteranopia (no green cones) | #2C436F | 0.031 |
| Tritanopia (no blue cones) | #005458 | 0.058 |
| Achromatopsia (no color) | #474747 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104B70
#104B70
oklch(39.6% 0.085 242.1)
- #663A0A
#663A0A
oklch(39.5% 0.085 61.6)
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 #104B70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.033
- Light Navy #155084 ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.038
- Charcoal #264653 ΔE 0.049
- Dusk Blue #26538D ΔE 0.056
- Cobalt #1E488F ΔE 0.056
- Deep Teal #00555A ΔE 0.057
Use #104B70 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.