#1F87BB
Closest named color: Blue NCS (#118AB2). oklch(59.2% 0.119 236.8), rgb(31, 135, 187).
Aa
Black text reads best on this color (5.24:1).
About this color
#1F87BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.119 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.019 away. Black text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.24:1 |
| White text | 4.00:1 |
Values
| HEX | #1F87BB |
| RGB | rgb(31, 135, 187) |
| HSL | hsl(200, 72%, 43%) |
| OKLCH | oklch(59.2% 0.119 236.8) |
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 #1F87BB | 4.00:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #1F87BB | 5.24:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #1F87BB text on white | 4.00:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #1F87BB text on black | 5.24:1 | AA | Lc -34.7 | Non-text elements, placeholder text |
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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DDEB
oklch(88.6% 0.03 236.9)
-
Step 300
300
#A0C7DF
oklch(81% 0.054 235.3)
-
Step 400
400
#6AA9CF
oklch(70.7% 0.086 236.2)
-
Step 500
500
#3C93C3
oklch(63.2% 0.109 236.5)
-
Step 600
600 (this color)
#1F87BB
oklch(59.2% 0.119 236.8)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#03557A
oklch(42.6% 0.091 236.8)
-
Step 900
900
#124762
oklch(37.8% 0.071 235.8)
-
Step 950
950
#0D2A3A
oklch(27.1% 0.045 236.1)
#1F87BB 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) | #6E87BD | 0.068 |
| Deuteranopia (no green cones) | #5979BA | 0.055 |
| Tritanopia (no blue cones) | #009499 | 0.075 |
| Achromatopsia (no color) | #7F7F7F | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F87BB
#1F87BB
oklch(59.2% 0.119 236.8)
- #B2692D
#B2692D
oklch(59.1% 0.119 56.7)
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 #1F87BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.019
- Steel Blue #4682B4 ΔE 0.026
- Water Blue #0E87CC ΔE 0.026
- Cool Blue #4984B8 ΔE 0.027
- Nice Blue #107AB0 ΔE 0.040
- Off Blue #5684AE ΔE 0.042
- Windows Blue #3778BF ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.047
Use #1F87BB 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.