#1B83AE
Closest named color: Blue NCS (#118AB2). oklch(57.4% 0.11 232.1), rgb(27, 131, 174).
Aa
Black text reads best on this color (4.90:1).
About this color
#1B83AE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.110 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.020 away. Black text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 4.90:1 |
| White text | 4.28:1 |
Values
| HEX | #1B83AE |
| RGB | rgb(27, 131, 174) |
| HSL | hsl(198, 73%, 39%) |
| OKLCH | oklch(57.4% 0.11 232.1) |
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 #1B83AE | 4.28:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #1B83AE | 4.90:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #1B83AE text on white | 4.28:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #1B83AE text on black | 4.90:1 | AA | Lc -32.5 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE8
oklch(88.5% 0.027 230.4)
-
Step 300
300
#A1C7DB
oklch(80.9% 0.049 231.1)
-
Step 400
400
#6CAACA
oklch(70.8% 0.079 231.9)
-
Step 500
500
#3F94BC
oklch(63.2% 0.101 231.9)
-
Step 600
600 (this color)
#1B83AE
oklch(57.4% 0.11 232.1)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#075675
oklch(42.6% 0.085 232.3)
-
Step 900
900
#14475E
oklch(37.6% 0.066 232.1)
-
Step 950
950
#0E2A37
oklch(27% 0.041 231.2)
#1B83AE 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) | #6D82B0 | 0.071 |
| Deuteranopia (no green cones) | #5A74AD | 0.060 |
| Tritanopia (no blue cones) | #008F92 | 0.065 |
| Achromatopsia (no color) | #7A7A7A | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B83AE
#1B83AE
oklch(57.4% 0.11 232.1)
- #AB6436
#AB6436
oklch(57.4% 0.11 51.8)
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 #1B83AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.020
- Nice Blue #107AB0 ΔE 0.029
- Steel Blue #4682B4 ΔE 0.030
- Teal Blue #01889F ΔE 0.032
- Cool Blue #4984B8 ΔE 0.036
- Cerulean #457B9D ΔE 0.036
- Stormy Blue #507B9C ΔE 0.044
- Off Blue #5684AE ΔE 0.044
Use #1B83AE 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.