#1891D8
Closest named color: Water Blue (#0E87CC). oklch(63% 0.144 242.4), rgb(24, 145, 216).
Aa
Black text reads best on this color (6.08:1).
About this color
#1891D8 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.144 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.032 away. Black text reads best on it, at 6.08:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 6.08:1 |
| White text | 3.45:1 |
Values
| HEX | #1891D8 |
| RGB | rgb(24, 145, 216) |
| HSL | hsl(202, 80%, 47%) |
| OKLCH | oklch(63% 0.144 242.4) |
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 #1891D8 | 3.45:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #1891D8 | 6.08:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #1891D8 text on white | 3.45:1 | AA large text | Lc 61.5 | Content text, not long reading |
| #1891D8 text on black | 6.08:1 | AA | Lc -40.2 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C4DDF1
oklch(88.5% 0.038 242.2)
-
Step 300
300
#99C7EB
oklch(81% 0.07 242.3)
-
Step 400
400
#5BA9E1
oklch(70.8% 0.113 241.9)
-
Step 500
500 (this color)
#1891D8
oklch(63% 0.144 242.4)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#00466D
oklch(37.8% 0.09 242.2)
-
Step 950
950
#042941
oklch(27% 0.06 242.6)
#1891D8 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) | #6F93DB | 0.066 |
| Deuteranopia (no green cones) | #5583D7 | 0.049 |
| Tritanopia (no blue cones) | #00A3AA | 0.099 |
| Achromatopsia (no color) | #8A8A8A | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1891D8
#1891D8
oklch(63% 0.144 242.4)
- #C57202
#C57202
oklch(63% 0.144 62.5)
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 #1891D8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.047
- Cool Blue #4984B8 ΔE 0.056
- Blue NCS #118AB2 ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.060
- Steel Blue #4682B4 ΔE 0.062
- Faded Blue #658CBB ΔE 0.064
Use #1891D8 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.