#1F90BD
Closest named color: Blue NCS (#118AB2). oklch(61.4% 0.116 231), rgb(31, 144, 189).
Aa
Black text reads best on this color (5.78:1).
About this color
#1F90BD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.116 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.023 away. Black text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.78:1 |
| White text | 3.63:1 |
Values
| HEX | #1F90BD |
| RGB | rgb(31, 144, 189) |
| HSL | hsl(197, 72%, 43%) |
| OKLCH | oklch(61.4% 0.116 231) |
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 #1F90BD | 3.63:1 | AA large text | Lc -68.9 | Content text, not long reading |
| Black text on #1F90BD | 5.78:1 | AA | Lc 40.6 | Non-text elements, placeholder text |
| #1F90BD text on white | 3.63:1 | AA large text | Lc 63.5 | Content text, not long reading |
| #1F90BD text on black | 5.78:1 | AA | Lc -38.2 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C5DDEA
oklch(88.4% 0.031 231.3)
-
Step 300
300
#9CC8DF
oklch(80.9% 0.057 231.1)
-
Step 400
400
#61ABCF
oklch(70.7% 0.091 231.1)
-
Step 500
500 (this color)
#1F90BD
oklch(61.4% 0.116 231)
-
Step 600
600
#007EA9
oklch(55.6% 0.112 231.2)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900
#014862
oklch(37.7% 0.075 231)
-
Step 950
950
#072A39
oklch(26.9% 0.048 231)
#1F90BD 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) | #798EBF | 0.077 |
| Deuteranopia (no green cones) | #6580BC | 0.066 |
| Tritanopia (no blue cones) | #009C9F | 0.067 |
| Achromatopsia (no color) | #868686 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F90BD
#1F90BD
oklch(61.4% 0.116 231)
- #BB6E3F
#BB6E3F
oklch(61.4% 0.116 50.6)
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 #1F90BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.023
- Cool Blue #4984B8 ΔE 0.038
- Water Blue #0E87CC ΔE 0.039
- Steel Blue #4682B4 ΔE 0.041
- Off Blue #5684AE ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.047
- Teal Blue #01889F ΔE 0.050
- Faded Blue #658CBB ΔE 0.053
Use #1F90BD 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.