#598FCB
Closest named color: Faded Blue (#658CBB). oklch(63.8% 0.108 252.2), rgb(89, 143, 203).
Aa
Black text reads best on this color (6.21:1).
About this color
#598FCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.108 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.025 away. Black text reads best on it, at 6.21:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.21:1 |
| White text | 3.37:1 |
Values
| HEX | #598FCB |
| RGB | rgb(89, 143, 203) |
| HSL | hsl(212, 52%, 57%) |
| OKLCH | oklch(63.8% 0.108 252.2) |
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 #598FCB | 3.37:1 | AA large text | Lc -66.6 | Content text, not long reading |
| Black text on #598FCB | 6.21:1 | AA | Lc 43.0 | Non-text elements, placeholder text |
| #598FCB text on white | 3.37:1 | AA large text | Lc 61.1 | Content text, not long reading |
| #598FCB text on black | 6.21:1 | AA | Lc -40.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEC
oklch(88.5% 0.029 251.5)
-
Step 300
300
#A9C3E2
oklch(80.8% 0.052 253)
-
Step 400
400
#7AA4D4
oklch(70.7% 0.084 252.3)
-
Step 500
500 (this color)
#598FCB
oklch(63.8% 0.108 252.2)
-
Step 600
600
#3B76B5
oklch(55.6% 0.116 252)
-
Step 700
700
#2D639C
oklch(49.1% 0.108 252)
-
Step 800
800
#26517F
oklch(42.8% 0.09 252.1)
-
Step 900
900
#244366
oklch(37.7% 0.071 252.7)
-
Step 950
950
#16283C
oklch(27.2% 0.044 252.1)
#598FCB 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) | #7692CE | 0.035 |
| Deuteranopia (no green cones) | #6787CA | 0.025 |
| Tritanopia (no blue cones) | #009DA4 | 0.094 |
| Achromatopsia (no color) | #8C8C8C | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #598FCB
#598FCB
oklch(63.8% 0.108 252.2)
- #B4803A
#B4803A
oklch(63.9% 0.108 71.7)
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 #598FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.042
- Cool Blue #4984B8 ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.047
- Off Blue #5684AE ΔE 0.049
- Steel Blue #4682B4 ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.054
Use #598FCB 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.