#1F6FBC
Closest named color: Mid Blue (#276AB3). oklch(53.5% 0.142 251.8), rgb(31, 111, 188).
Aa
White text reads best on this color (5.17:1).
About this color
#1F6FBC is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.142 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.018 away. White text reads best on it, at 5.17:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.05:1 |
| White text | 5.17:1 |
Values
| HEX | #1F6FBC |
| RGB | rgb(31, 111, 188) |
| HSL | hsl(209, 72%, 43%) |
| OKLCH | oklch(53.5% 0.142 251.8) |
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 #1F6FBC | 5.17:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #1F6FBC | 4.05:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #1F6FBC text on white | 5.17:1 | AA | Lc 75.2 | Fine for body text |
| #1F6FBC text on black | 4.05:1 | AA large text | Lc -26.6 | 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 600.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A3C4E9
oklch(80.9% 0.064 251.5)
-
Step 400
400
#70A5DF
oklch(70.8% 0.102 251.5)
-
Step 500
500
#488DD5
oklch(63.1% 0.13 251.5)
-
Step 600
600 (this color)
#1F6FBC
oklch(53.5% 0.142 251.8)
-
Step 700
700
#1862A8
oklch(49% 0.132 251.8)
-
Step 800
800
#185088
oklch(42.6% 0.109 252.1)
-
Step 900
900
#1B436D
oklch(37.7% 0.085 252)
-
Step 950
950
#112840
oklch(27.1% 0.054 251.3)
#1F6FBC 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) | #4975BF | 0.040 |
| Deuteranopia (no green cones) | #2E67BA | 0.022 |
| Tritanopia (no blue cones) | #00818C | 0.104 |
| Achromatopsia (no color) | #6D6D6D | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F6FBC
#1F6FBC
oklch(53.5% 0.142 251.8)
- #966000
#966000
oklch(53.5% 0.115 71.4)
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 #1F6FBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.018
- Windows Blue #3778BF ΔE 0.032
- French Blue #436BAD ΔE 0.034
- Nice Blue #107AB0 ΔE 0.040
- Flat Blue #3C73A8 ΔE 0.041
- Muted Blue #3B719F ΔE 0.050
- Ocean Blue #03719C ΔE 0.055
- Dull Blue #49759C ΔE 0.065
Use #1F6FBC 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.