#104FB4
Closest named color: Blue Blue (#2242C7). oklch(45.5% 0.172 260.2), rgb(16, 79, 180).
Aa
White text reads best on this color (7.50:1).
About this color
#104FB4 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.172 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.042 away. White text reads best on it, at 7.50:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #104FB4 |
| RGB | rgb(16, 79, 180) |
| HSL | hsl(217, 84%, 38%) |
| OKLCH | oklch(45.5% 0.172 260.2) |
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 #104FB4 | 7.50:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #104FB4 | 2.79:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #104FB4 text on white | 7.50:1 | AAA | Lc 85.4 | Fine for body text |
| #104FB4 text on black | 2.79:1 | Fails | Lc -16.7 | Dividers and decoration only |
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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C4DAFF
oklch(88.4% 0.057 260.8)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3A83FF
oklch(63.1% 0.199 260.3)
-
Step 600
600
#0A67F2
oklch(55.5% 0.223 260.3)
-
Step 700
700
#0055D1
oklch(49.1% 0.204 260.3)
-
Step 800
800 (this color)
#104FB4
oklch(45.5% 0.172 260.2)
-
Step 900
900
#0F3D87
oklch(37.8% 0.133 260)
-
Step 950
950
#0B244F
oklch(27% 0.085 260.5)
#104FB4 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) | #005CB7 | 0.033 |
| Deuteranopia (no green cones) | #004EB2 | 0.007 |
| Tritanopia (no blue cones) | #006879 | 0.131 |
| Achromatopsia (no color) | #555555 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104FB4
#104FB4
oklch(45.5% 0.172 260.2)
- #725000
#725000
oklch(45.6% 0.094 80.3)
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 #104FB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.042
- Sapphire #2138AB ΔE 0.055
- Cobalt #1E488F ΔE 0.061
- Dusk Blue #26538D ΔE 0.066
- Majorelle Blue #3F37C9 ΔE 0.068
- Blueberry #464196 ΔE 0.073
- Denim Blue #3B5B92 ΔE 0.077
- Mid Blue #276AB3 ΔE 0.078
Use #104FB4 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.