#104AA0
Closest named color: Cobalt (#1E488F). oklch(42.8% 0.151 259.2), rgb(16, 74, 160).
Aa
White text reads best on this color (8.36:1).
About this color
#104AA0 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.151 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 8.36:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.50:1 |
| White text | 8.36:1 |
Values
| HEX | #104AA0 |
| RGB | rgb(16, 74, 160) |
| HSL | hsl(216, 82%, 35%) |
| OKLCH | oklch(42.8% 0.151 259.2) |
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 #104AA0 | 8.36:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #104AA0 | 2.50:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #104AA0 text on white | 8.36:1 | AAA | Lc 88.2 | Fine for body text |
| #104AA0 text on black | 2.50:1 | Fails | Lc -13.9 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9FC2FA
oklch(80.9% 0.088 259.7)
-
Step 400
400
#69A0F8
oklch(70.6% 0.142 259.4)
-
Step 500
500
#3F86F4
oklch(63.1% 0.18 259)
-
Step 600
600
#1C6CE3
oklch(55.6% 0.196 259.3)
-
Step 700
700
#0D59C6
oklch(49.1% 0.184 259.4)
-
Step 800
800 (this color)
#104AA0
oklch(42.8% 0.151 259.2)
-
Step 900
900
#153F7F
oklch(37.8% 0.118 259)
-
Step 950
950
#0E254A
oklch(26.9% 0.075 259.5)
#104AA0 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) | #0354A3 | 0.027 |
| Deuteranopia (no green cones) | #00489E | 0.010 |
| Tritanopia (no blue cones) | #005F6D | 0.115 |
| Achromatopsia (no color) | #4E4E4E | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104AA0
#104AA0
oklch(42.8% 0.151 259.2)
- #694800
#694800
oklch(42.7% 0.089 78.7)
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 #104AA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Dusk Blue #26538D ΔE 0.046
- Sapphire #2138AB ΔE 0.046
- Light Navy #155084 ΔE 0.051
- Blueberry #464196 ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.065
- Blue Blue #2242C7 ΔE 0.066
Use #104AA0 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.