#1898BF
Closest named color: Blue NCS (#118AB2). oklch(63.4% 0.116 225.4), rgb(24, 152, 191).
Aa
Black text reads best on this color (6.28:1).
About this color
#1898BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.116 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.042 away. Black text reads best on it, at 6.28:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.28:1 |
| White text | 3.34:1 |
Values
| HEX | #1898BF |
| RGB | rgb(24, 152, 191) |
| HSL | hsl(194, 78%, 42%) |
| OKLCH | oklch(63.4% 0.116 225.4) |
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 #1898BF | 3.34:1 | AA large text | Lc -65.8 | Content text, not long reading |
| Black text on #1898BF | 6.28:1 | AA | Lc 43.7 | Non-text elements, placeholder text |
| #1898BF text on white | 3.34:1 | AA large text | Lc 60.4 | Content text, not long reading |
| #1898BF text on black | 6.28:1 | AA | Lc -41.4 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFECF2
oklch(93.5% 0.016 227)
-
Step 200
200
#C4DEE9
oklch(88.5% 0.032 225.1)
-
Step 300
300
#9AC9DD
oklch(80.9% 0.057 225.9)
-
Step 400
400
#5CADCB
oklch(70.8% 0.09 224.5)
-
Step 500
500 (this color)
#1898BF
oklch(63.4% 0.116 225.4)
-
Step 600
600
#007FA2
oklch(55.5% 0.106 225.7)
-
Step 700
700
#006B89
oklch(49.1% 0.094 225.7)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#00495E
oklch(37.7% 0.071 225)
-
Step 950
950
#042B38
oklch(27% 0.048 225.4)
#1898BF 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) | #8395C1 | 0.088 |
| Deuteranopia (no green cones) | #6E86BF | 0.076 |
| Tritanopia (no blue cones) | #00A3A5 | 0.059 |
| Achromatopsia (no color) | #8C8C8C | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1898BF
#1898BF
oklch(63.4% 0.116 225.4)
- #C3724C
#C3724C
oklch(63.3% 0.115 45.2)
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 #1898BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.042
- Cool Blue #4984B8 ΔE 0.057
- Faded Blue #658CBB ΔE 0.058
- Water Blue #0E87CC ΔE 0.058
- Dusty Blue #5A86AD ΔE 0.060
- Teal Blue #01889F ΔE 0.062
- Steel Blue #4682B4 ΔE 0.062
- Off Blue #5684AE ΔE 0.062
Use #1898BF 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.