#1A90CB
Closest named color: Water Blue (#0E87CC). oklch(62.1% 0.13 237.8), rgb(26, 144, 203).
Aa
Black text reads best on this color (5.89:1).
About this color
#1A90CB is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.130 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.027 away. Black text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.89:1 |
| White text | 3.56:1 |
Values
| HEX | #1A90CB |
| RGB | rgb(26, 144, 203) |
| HSL | hsl(200, 77%, 45%) |
| OKLCH | oklch(62.1% 0.13 237.8) |
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 #1A90CB | 3.56:1 | AA large text | Lc -68.2 | Content text, not long reading |
| Black text on #1A90CB | 5.89:1 | AA | Lc 41.4 | Non-text elements, placeholder text |
| #1A90CB text on white | 3.56:1 | AA large text | Lc 62.7 | Content text, not long reading |
| #1A90CB text on black | 5.89:1 | AA | Lc -39.0 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C4DDEE
oklch(88.4% 0.036 237.6)
-
Step 300
300
#9AC7E5
oklch(80.8% 0.064 237.8)
-
Step 400
400
#5EAAD9
oklch(70.8% 0.102 237.7)
-
Step 500
500 (this color)
#1A90CB
oklch(62.1% 0.13 237.8)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#062A3D
oklch(27.1% 0.053 236.9)
#1A90CB 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) | #7390CE | 0.071 |
| Deuteranopia (no green cones) | #5C81CA | 0.057 |
| Tritanopia (no blue cones) | #009FA5 | 0.083 |
| Achromatopsia (no color) | #888888 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A90CB
#1A90CB
oklch(62.1% 0.13 237.8)
- #C07028
#C07028
oklch(62.2% 0.131 58)
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 #1A90CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.027
- Blue NCS #118AB2 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.048
- Steel Blue #4682B4 ΔE 0.048
- Faded Blue #658CBB ΔE 0.056
- Off Blue #5684AE ΔE 0.056
- Dusty Blue #5A86AD ΔE 0.058
Use #1A90CB 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.