#104FA7
Closest named color: Cobalt (#1E488F). oklch(44.5% 0.155 258.6), rgb(16, 79, 167).
Aa
White text reads best on this color (7.78:1).
About this color
#104FA7 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.155 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.042 away. White text reads best on it, at 7.78:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.69:1 |
| White text | 7.78:1 |
Values
| HEX | #104FA7 |
| RGB | rgb(16, 79, 167) |
| HSL | hsl(215, 83%, 36%) |
| OKLCH | oklch(44.5% 0.155 258.6) |
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 #104FA7 | 7.78:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #104FA7 | 2.69:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #104FA7 text on white | 7.78:1 | AAA | Lc 86.4 | Fine for body text |
| #104FA7 text on black | 2.69:1 | Fails | Lc -15.7 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9DC2FB
oklch(80.8% 0.091 258.9)
-
Step 400
400
#66A1F9
oklch(70.7% 0.144 258.2)
-
Step 500
500
#3A86F7
oklch(63.2% 0.185 258.5)
-
Step 600
600
#126CE5
oklch(55.6% 0.2 258.6)
-
Step 700
700
#0059C7
oklch(49% 0.186 258.6)
-
Step 800
800 (this color)
#104FA7
oklch(44.5% 0.155 258.6)
-
Step 900
900
#123F80
oklch(37.8% 0.12 258.4)
-
Step 950
950
#0C254B
oklch(26.9% 0.077 258.8)
#104FA7 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) | #0D59AA | 0.027 |
| Deuteranopia (no green cones) | #004CA5 | 0.011 |
| Tritanopia (no blue cones) | #006573 | 0.118 |
| Achromatopsia (no color) | #525252 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104FA7
#104FA7
oklch(44.5% 0.155 258.6)
- #6F4C00
#6F4C00
oklch(44.4% 0.092 78.3)
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 #104FA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.042
- Dusk Blue #26538D ΔE 0.047
- Sapphire #2138AB ΔE 0.055
- Light Navy #155084 ΔE 0.058
- Blue Blue #2242C7 ΔE 0.060
- Blueberry #464196 ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.065
Use #104FA7 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.