#1B7CD7
Closest named color: Water Blue (#0E87CC). oklch(58.2% 0.163 252.2), rgb(27, 124, 215).
Aa
Black text reads best on this color (4.91:1).
About this color
#1B7CD7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.163 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.037 away. Black text reads best on it, at 4.91:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #1B7CD7 |
| RGB | rgb(27, 124, 215) |
| HSL | hsl(209, 78%, 47%) |
| OKLCH | oklch(58.2% 0.163 252.2) |
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 #1B7CD7 | 4.27:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #1B7CD7 | 4.91:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #1B7CD7 text on white | 4.27:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #1B7CD7 text on black | 4.91:1 | AA | Lc -32.7 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DCF4
oklch(88.6% 0.041 250.6)
-
Step 300
300
#9FC4EF
oklch(80.9% 0.073 252.5)
-
Step 400
400
#68A4E8
oklch(70.6% 0.118 252.6)
-
Step 500
500
#3B8CE1
oklch(63.1% 0.15 252.3)
-
Step 600
600 (this color)
#1B7CD7
oklch(58.2% 0.163 252.2)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800
#054F91
oklch(42.6% 0.126 252.6)
-
Step 900
900
#124373
oklch(37.8% 0.097 251.8)
-
Step 950
950
#0D2744
oklch(27% 0.063 253.3)
#1B7CD7 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) | #4D83DB | 0.042 |
| Deuteranopia (no green cones) | #2973D5 | 0.023 |
| Tritanopia (no blue cones) | #00929F | 0.120 |
| Achromatopsia (no color) | #7A7A7A | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B7CD7
#1B7CD7
oklch(58.2% 0.163 252.2)
- #A76D00
#A76D00
oklch(58.2% 0.124 72.6)
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 #1B7CD7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.037
- Windows Blue #3778BF ΔE 0.038
- Cerulean Blue #056EEE ΔE 0.054
- Royal Blue #4169E1 ΔE 0.055
- Clear Blue #247AFD ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.061
- Nice Blue #107AB0 ΔE 0.061
- Cool Blue #4984B8 ΔE 0.064
Use #1B7CD7 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.