#104FA9
Closest named color: Cobalt (#1E488F). oklch(44.6% 0.157 258.9), rgb(16, 79, 169).
Aa
White text reads best on this color (7.73:1).
About this color
#104FA9 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.157 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.044 away. White text reads best on it, at 7.73:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.71:1 |
| White text | 7.73:1 |
Values
| HEX | #104FA9 |
| RGB | rgb(16, 79, 169) |
| HSL | hsl(215, 83%, 36%) |
| OKLCH | oklch(44.6% 0.157 258.9) |
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 #104FA9 | 7.73:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #104FA9 | 2.71:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #104FA9 text on white | 7.73:1 | AAA | Lc 86.2 | Fine for body text |
| #104FA9 text on black | 2.71:1 | Fails | Lc -15.8 | 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
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9DC2FC
oklch(80.8% 0.092 259.2)
-
Step 400
400
#66A0FB
oklch(70.6% 0.147 259.1)
-
Step 500
500
#3A85F8
oklch(63% 0.187 259)
-
Step 600
600
#106BE7
oklch(55.5% 0.204 258.9)
-
Step 700
700
#0059C9
oklch(49.2% 0.189 258.8)
-
Step 800
800 (this color)
#104FA9
oklch(44.6% 0.157 258.9)
-
Step 900
900
#123E81
oklch(37.6% 0.123 259.1)
-
Step 950
950
#0C254C
oklch(27% 0.079 259.2)
#104FA9 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) | #065AAC | 0.029 |
| Deuteranopia (no green cones) | #004CA7 | 0.011 |
| Tritanopia (no blue cones) | #006574 | 0.119 |
| Achromatopsia (no color) | #535353 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104FA9
#104FA9
oklch(44.6% 0.157 258.9)
- #704D00
#704D00
oklch(44.7% 0.093 78.6)
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 #104FA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.044
- Dusk Blue #26538D ΔE 0.050
- Sapphire #2138AB ΔE 0.054
- Blue Blue #2242C7 ΔE 0.057
- Light Navy #155084 ΔE 0.061
- Blueberry #464196 ΔE 0.064
- Denim Blue #3B5B92 ΔE 0.066
- Deep Sea Blue #015482 ΔE 0.068
Use #104FA9 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.