#1B449B
Closest named color: Cobalt (#1E488F). oklch(41.4% 0.15 262.7), rgb(27, 68, 155).
Aa
White text reads best on this color (8.94:1).
About this color
#1B449B is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.150 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.024 away. White text reads best on it, at 8.94:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #1B449B |
| RGB | rgb(27, 68, 155) |
| HSL | hsl(221, 70%, 36%) |
| OKLCH | oklch(41.4% 0.15 262.7) |
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 #1B449B | 8.94:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #1B449B | 2.34:1 | Fails | Lc 14.0 | Not readable |
| #1B449B text on white | 8.94:1 | AAA | Lc 90.0 | Fine for body text |
| #1B449B text on black | 2.34:1 | Fails | Lc -12.3 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A3C1FA
oklch(80.9% 0.087 263)
-
Step 400
400
#719FF7
oklch(70.8% 0.139 262.4)
-
Step 500
500
#4C83F4
oklch(63% 0.179 262.8)
-
Step 600
600
#306AE3
oklch(55.7% 0.194 262.6)
-
Step 700
700
#2357C5
oklch(49.1% 0.181 262.7)
-
Step 800
800 (this color)
#1B449B
oklch(41.4% 0.15 262.7)
-
Step 900
900
#1E3D7E
oklch(37.6% 0.116 262.9)
-
Step 950
950
#12254A
oklch(27.1% 0.073 262.2)
#1B449B 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) | #00509E | 0.032 |
| Deuteranopia (no green cones) | #004499 | 0.014 |
| Tritanopia (no blue cones) | #005A68 | 0.117 |
| Achromatopsia (no color) | #494949 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B449B
#1B449B
oklch(41.4% 0.15 262.7)
- #624600
#624600
oklch(41.4% 0.085 82.4)
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 #1B449B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.024
- Sapphire #2138AB ΔE 0.038
- Blueberry #464196 ΔE 0.051
- Dusk Blue #26538D ΔE 0.052
- Light Navy #155084 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.061
- Deep Sea Blue #015482 ΔE 0.066
Use #1B449B 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.