#104E73
Closest named color: Deep Sea Blue (#015482). oklch(40.6% 0.086 241), rgb(16, 78, 115).
Aa
White text reads best on this color (8.90:1).
About this color
#104E73 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.086 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.028 away. White text reads best on it, at 8.90:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.35:1 |
| White text | 8.90:1 |
Values
| HEX | #104E73 |
| RGB | rgb(16, 78, 115) |
| HSL | hsl(202, 76%, 26%) |
| OKLCH | oklch(40.6% 0.086 241) |
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 #104E73 | 8.90:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #104E73 | 2.35:1 | Fails | Lc 14.0 | Not readable |
| #104E73 text on white | 8.90:1 | AAA | Lc 90.0 | Preferred for body text |
| #104E73 text on black | 2.35:1 | Fails | Lc -12.2 | 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 800.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A4C5DF
oklch(80.8% 0.051 242)
-
Step 400
400
#72A7CE
oklch(70.6% 0.08 241.2)
-
Step 500
500
#4A91C2
oklch(63.1% 0.103 241.1)
-
Step 600
600
#277AAE
oklch(55.5% 0.112 241.1)
-
Step 700
700
#186796
oklch(49.2% 0.104 240.9)
-
Step 800
800 (this color)
#104E73
oklch(40.6% 0.086 241)
-
Step 900
900
#1B4662
oklch(37.8% 0.067 240.5)
-
Step 950
950
#112939
oklch(27% 0.042 240.1)
#104E73 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) | #3C4F75 | 0.042 |
| Deuteranopia (no green cones) | #2F4672 | 0.032 |
| Tritanopia (no blue cones) | #00575B | 0.057 |
| Achromatopsia (no color) | #4A4A4A | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104E73
#104E73
oklch(40.6% 0.086 241)
- #6A3D0D
#6A3D0D
oklch(40.7% 0.086 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 #104E73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.028
- Light Navy #155084 ΔE 0.029
- Twilight Blue #0A437A ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.044
- Dusk Blue #26538D ΔE 0.049
- Charcoal #264653 ΔE 0.054
- Cobalt #1E488F ΔE 0.054
- Deep Teal #00555A ΔE 0.055
Use #104E73 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.