#1C99B7
Closest named color: Blue NCS (#118AB2). oklch(63.3% 0.109 219.4), rgb(28, 153, 183).
Aa
Black text reads best on this color (6.28:1).
About this color
#1C99B7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.109 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.044 away. Black text reads best on it, at 6.28:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.28:1 |
| White text | 3.33:1 |
Values
| HEX | #1C99B7 |
| RGB | rgb(28, 153, 183) |
| HSL | hsl(192, 73%, 41%) |
| OKLCH | oklch(63.3% 0.109 219.4) |
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 #1C99B7 | 3.33:1 | AA large text | Lc -65.8 | Content text, not long reading |
| Black text on #1C99B7 | 6.28:1 | AA | Lc 43.7 | Non-text elements, placeholder text |
| #1C99B7 text on white | 3.33:1 | AA large text | Lc 60.3 | Content text, not long reading |
| #1C99B7 text on black | 6.28:1 | AA | Lc -41.4 | 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 500.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFEDF1
oklch(93.7% 0.016 216.7)
-
Step 200
200
#C5DEE7
oklch(88.5% 0.029 221.4)
-
Step 300
300
#9BC9D8
oklch(80.8% 0.053 219.8)
-
Step 400
400
#5EADC5
oklch(70.6% 0.085 219.9)
-
Step 500
500 (this color)
#1C99B7
oklch(63.3% 0.109 219.4)
-
Step 600
600
#00809B
oklch(55.5% 0.101 219.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#052B35
oklch(26.9% 0.045 219.7)
#1C99B7 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) | #8695B9 | 0.091 |
| Deuteranopia (no green cones) | #7386B7 | 0.082 |
| Tritanopia (no blue cones) | #00A3A3 | 0.049 |
| Achromatopsia (no color) | #8D8D8D | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C99B7
#1C99B7
oklch(63.3% 0.109 219.4)
- #C27257
#C27257
oklch(63.4% 0.109 39.3)
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 #1C99B7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.044
- Teal Green #0A9396 ΔE 0.051
- Sea #3C9992 ΔE 0.057
- Teal Blue #01889F ΔE 0.057
- Cadet Blue #5F9EA0 ΔE 0.059
- Dusty Blue #5A86AD ΔE 0.061
- Faded Blue #658CBB ΔE 0.062
- Cool Blue #4984B8 ΔE 0.063
Use #1C99B7 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.