#1997B3
Closest named color: Blue NCS (#118AB2). oklch(62.6% 0.108 218), rgb(25, 151, 179).
Aa
Black text reads best on this color (6.11:1).
About this color
#1997B3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.108 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.039 away. Black text reads best on it, at 6.11:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.11:1 |
| White text | 3.43:1 |
Values
| HEX | #1997B3 |
| RGB | rgb(25, 151, 179) |
| HSL | hsl(191, 75%, 40%) |
| OKLCH | oklch(62.6% 0.108 218) |
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 #1997B3 | 3.43:1 | AA large text | Lc -66.8 | Content text, not long reading |
| Black text on #1997B3 | 6.11:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #1997B3 text on white | 3.43:1 | AA large text | Lc 61.4 | Content text, not long reading |
| #1997B3 text on black | 6.11:1 | AA | Lc -40.3 | 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
#F1F7F9
oklch(97.2% 0.007 219.6)
-
Step 100
100
#DFEDF1
oklch(93.7% 0.016 216.7)
-
Step 200
200
#C5DEE6
oklch(88.5% 0.029 219)
-
Step 300
300
#9BC9D7
oklch(80.8% 0.052 218.4)
-
Step 400
400
#5EAEC4
oklch(70.8% 0.085 217.8)
-
Step 500
500 (this color)
#1997B3
oklch(62.6% 0.108 218)
-
Step 600
600
#00819A
oklch(55.7% 0.1 217.7)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950
#052B35
oklch(26.9% 0.045 219.7)
#1997B3 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) | #8592B5 | 0.092 |
| Deuteranopia (no green cones) | #7284B3 | 0.083 |
| Tritanopia (no blue cones) | #00A0A0 | 0.046 |
| Achromatopsia (no color) | #8A8A8A | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1997B3
#1997B3
oklch(62.6% 0.108 218)
- #BF7057
#BF7057
oklch(62.7% 0.107 38.3)
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 #1997B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.039
- Teal Green #0A9396 ΔE 0.045
- Teal Blue #01889F ΔE 0.050
- Sea #3C9992 ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.058
- Cadet Blue #5F9EA0 ΔE 0.060
- Cool Blue #4984B8 ΔE 0.061
- Off Blue #5684AE ΔE 0.061
Use #1997B3 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.