#1D99BE
Closest named color: Blue NCS (#118AB2). oklch(63.6% 0.114 224.3), rgb(29, 153, 190).
Aa
Black text reads best on this color (6.35:1).
About this color
#1D99BE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.114 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.045 away. Black text reads best on it, at 6.35:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.35:1 |
| White text | 3.30:1 |
Values
| HEX | #1D99BE |
| RGB | rgb(29, 153, 190) |
| HSL | hsl(194, 74%, 43%) |
| OKLCH | oklch(63.6% 0.114 224.3) |
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 #1D99BE | 3.30:1 | AA large text | Lc -65.4 | Content text, not long reading |
| Black text on #1D99BE | 6.35:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #1D99BE text on white | 3.30:1 | AA large text | Lc 60.0 | Large or bold text, headings |
| #1D99BE text on black | 6.35:1 | AA | Lc -41.7 | 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 500.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFECF2
oklch(93.5% 0.016 227)
-
Step 200
200
#C4DEE8
oklch(88.5% 0.031 222.9)
-
Step 300
300
#9AC9DC
oklch(80.9% 0.056 224.7)
-
Step 400
400
#5DADCA
oklch(70.8% 0.089 224)
-
Step 500
500 (this color)
#1D99BE
oklch(63.6% 0.114 224.3)
-
Step 600
600
#0080A1
oklch(55.7% 0.105 224.1)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#052B37
oklch(27% 0.046 223.9)
#1D99BE 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) | #8496C0 | 0.087 |
| Deuteranopia (no green cones) | #7087BE | 0.077 |
| Tritanopia (no blue cones) | #00A4A5 | 0.058 |
| Achromatopsia (no color) | #8D8D8D | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D99BE
#1D99BE
oklch(63.6% 0.114 224.3)
- #C4734F
#C4734F
oklch(63.7% 0.114 44.2)
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 #1D99BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.045
- Faded Blue #658CBB ΔE 0.058
- Cool Blue #4984B8 ΔE 0.060
- Dusty Blue #5A86AD ΔE 0.061
- Teal Green #0A9396 ΔE 0.062
- Water Blue #0E87CC ΔE 0.062
- Teal Blue #01889F ΔE 0.063
- Off Blue #5684AE ΔE 0.063
Use #1D99BE 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.