#1F91AA
Closest named color: Blue NCS (#118AB2). oklch(60.8% 0.101 217), rgb(31, 145, 170).
Aa
Black text reads best on this color (5.68:1).
About this color
#1F91AA is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 61%, its chroma 0.101 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.028 away. Black text reads best on it, at 5.68:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.68:1 |
| White text | 3.69:1 |
Values
| HEX | #1F91AA |
| RGB | rgb(31, 145, 170) |
| HSL | hsl(191, 69%, 39%) |
| OKLCH | oklch(60.8% 0.101 217) |
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 #1F91AA | 3.69:1 | AA large text | Lc -69.6 | Content text, not long reading |
| Black text on #1F91AA | 5.68:1 | AA | Lc 40.0 | Non-text elements, placeholder text |
| #1F91AA text on white | 3.69:1 | AA large text | Lc 64.1 | Content text, not long reading |
| #1F91AA text on black | 5.68:1 | AA | Lc -37.6 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C6DEE5
oklch(88.5% 0.027 217.2)
-
Step 300
300
#9DC9D6
oklch(80.9% 0.05 217.8)
-
Step 400
400
#63ADC1
oklch(70.7% 0.079 217.2)
-
Step 500
500 (this color)
#1F91AA
oklch(60.8% 0.101 217)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#034A58
oklch(37.7% 0.066 216.2)
-
Step 950
950
#082B34
oklch(26.9% 0.042 218.6)
#1F91AA 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) | #818CAB | 0.089 |
| Deuteranopia (no green cones) | #6E7FAA | 0.079 |
| Tritanopia (no blue cones) | #009A99 | 0.044 |
| Achromatopsia (no color) | #858585 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F91AA
#1F91AA
oklch(60.8% 0.101 217)
- #B66C56
#B66C56
oklch(60.8% 0.101 37.3)
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 #1F91AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.028
- Teal Blue #01889F ΔE 0.031
- Teal Green #0A9396 ΔE 0.035
- Dark Cyan #008B8B ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.051
- Sea #3C9992 ΔE 0.052
- Off Blue #5684AE ΔE 0.052
- Steel Blue #4682B4 ΔE 0.054
Use #1F91AA 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.