#104BB0
Closest named color: Blue Blue (#2242C7). oklch(44.4% 0.172 260.9), rgb(16, 75, 176).
Aa
White text reads best on this color (7.90:1).
About this color
#104BB0 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.172 and its hue 261°. 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 7.90:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.65:1 |
| White text | 7.90:1 |
Values
| HEX | #104BB0 |
| RGB | rgb(16, 75, 176) |
| HSL | hsl(218, 83%, 38%) |
| OKLCH | oklch(44.4% 0.172 260.9) |
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 #104BB0 | 7.90:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #104BB0 | 2.65:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #104BB0 text on white | 7.90:1 | AAA | Lc 86.7 | Fine for body text |
| #104BB0 text on black | 2.65:1 | Fails | Lc -15.4 | 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
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#689FFF
oklch(70.7% 0.153 260.8)
-
Step 500
500
#3C83FF
oklch(63.2% 0.198 260.7)
-
Step 600
600
#1367F2
oklch(55.6% 0.222 260.8)
-
Step 700
700
#0354D3
oklch(49.1% 0.207 260.9)
-
Step 800
800 (this color)
#104BB0
oklch(44.4% 0.172 260.9)
-
Step 900
900
#123C87
oklch(37.7% 0.134 261)
-
Step 950
950
#0C244F
oklch(27% 0.085 261)
#104BB0 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) | #0059B3 | 0.036 |
| Deuteranopia (no green cones) | #004AAE | 0.008 |
| Tritanopia (no blue cones) | #006576 | 0.131 |
| Achromatopsia (no color) | #515151 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104BB0
#104BB0
oklch(44.4% 0.172 260.9)
- #6D4D00
#6D4D00
oklch(44.3% 0.092 81.1)
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 #104BB0, 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 0.044
- Cobalt #1E488F ΔE 0.054
- Dusk Blue #26538D ΔE 0.065
- Majorelle Blue #3F37C9 ΔE 0.067
- Blueberry #464196 ΔE 0.068
- Light Navy #155084 ΔE 0.075
- Denim Blue #3B5B92 ΔE 0.080
Use #104BB0 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.