#1B6BB7
Closest named color: Mid Blue (#276AB3). oklch(52.2% 0.141 251.9), rgb(27, 107, 183).
Aa
White text reads best on this color (5.47:1).
About this color
#1B6BB7 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.141 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.008 away. White text reads best on it, at 5.47:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.83:1 |
| White text | 5.47:1 |
Values
| HEX | #1B6BB7 |
| RGB | rgb(27, 107, 183) |
| HSL | hsl(209, 74%, 41%) |
| OKLCH | oklch(52.2% 0.141 251.9) |
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 #1B6BB7 | 5.47:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #1B6BB7 | 3.83:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #1B6BB7 text on white | 5.47:1 | AA | Lc 76.9 | Fine for body text |
| #1B6BB7 text on black | 3.83:1 | AA large text | Lc -24.9 | 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 700.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A1C4EC
oklch(80.9% 0.068 252)
-
Step 400
400
#6DA5E3
oklch(70.8% 0.109 251.9)
-
Step 500
500
#428CDA
oklch(63% 0.139 252)
-
Step 600
600
#1D75C8
oklch(55.6% 0.151 251.9)
-
Step 700
700 (this color)
#1B6BB7
oklch(52.2% 0.141 251.9)
-
Step 800
800
#10508C
oklch(42.7% 0.117 251.9)
-
Step 900
900
#174370
oklch(37.7% 0.091 252)
-
Step 950
950
#0F2741
oklch(26.8% 0.057 252.3)
#1B6BB7 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) | #4571BA | 0.039 |
| Deuteranopia (no green cones) | #2963B6 | 0.022 |
| Tritanopia (no blue cones) | #007D88 | 0.103 |
| Achromatopsia (no color) | #696969 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B6BB7
#1B6BB7
oklch(52.2% 0.141 251.9)
- #915D00
#915D00
oklch(52.3% 0.112 71.7)
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 #1B6BB7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.008
- French Blue #436BAD ΔE 0.033
- Flat Blue #3C73A8 ΔE 0.044
- Windows Blue #3778BF ΔE 0.045
- Nice Blue #107AB0 ΔE 0.046
- Muted Blue #3B719F ΔE 0.050
- Ocean Blue #03719C ΔE 0.051
- Peacock Blue #016795 ΔE 0.056
Use #1B6BB7 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.