#1B479F
Closest named color: Cobalt (#1E488F). oklch(42.3% 0.151 262.1), rgb(27, 71, 159).
Aa
White text reads best on this color (8.57:1).
About this color
#1B479F is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.151 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.027 away. White text reads best on it, at 8.57:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.44:1 |
| White text | 8.57:1 |
Values
| HEX | #1B479F |
| RGB | rgb(27, 71, 159) |
| HSL | hsl(220, 71%, 36%) |
| OKLCH | oklch(42.3% 0.151 262.1) |
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 #1B479F | 8.57:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #1B479F | 2.44:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #1B479F text on white | 8.57:1 | AAA | Lc 88.9 | Fine for body text |
| #1B479F text on black | 2.44:1 | Fails | Lc -13.3 | 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
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A2C1FA
oklch(80.9% 0.088 262.4)
-
Step 400
400
#6F9FF8
oklch(70.7% 0.141 261.9)
-
Step 500
500
#4984F5
oklch(63.2% 0.18 261.9)
-
Step 600
600
#2D6AE4
oklch(55.7% 0.196 262.2)
-
Step 700
700
#2057C6
oklch(49.1% 0.183 262.2)
-
Step 800
800 (this color)
#1B479F
oklch(42.3% 0.151 262.1)
-
Step 900
900
#1C3D7F
oklch(37.6% 0.119 262.3)
-
Step 950
950
#11254A
oklch(27.1% 0.074 261.5)
#1B479F 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) | #0052A2 | 0.029 |
| Deuteranopia (no green cones) | #00469D | 0.014 |
| Tritanopia (no blue cones) | #005D6C | 0.117 |
| Achromatopsia (no color) | #4C4C4C | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B479F
#1B479F
oklch(42.3% 0.151 262.1)
- #654800
#654800
oklch(42.2% 0.087 82.1)
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 #1B479F, closest first.
No curated palette has a color within ΔE 0.04 of #1B479F.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.027
- Sapphire #2138AB ΔE 0.040
- Dusk Blue #26538D ΔE 0.049
- Blueberry #464196 ΔE 0.051
- Light Navy #155084 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.063
- Twilight Blue #0A437A ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.065
Use #1B479F 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.